HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE
Tuesday, August 26, 2008 08:05 HST (Tuesday, August 26, 2008 18:05 UTC)
[link to volcano.wr.usgs.gov]
KILAUEA VOLCANO (CAVW#1302-01-)
19.42°N 155.29°W, Summit Elevation 4091 ft (1247 m)
Volcano Alert Level: WATCH
Aviation Color Code: ORANGE
This report on the status of Kilauea volcanic activity, in addition to maps, photos, and webcam images (available using the menu bar above), was prepared by the USGS Hawaiian Volcano Observatory (HVO). Hawai`i Volcanoes National Park status can be found at [link to www.nps.gov]
Activity Summary for last 24 hours: Kilauea summit continued to produce small amounts of ash and elevated amounts of sulfur dioxide gas from the Halema`uma`u vent; a DI tilt even is nearing completion. At the east rift eruption site, Pu`u `O`o cone continued to produce high amounts of sulfur dioxide gas; lava is flowing through tubes to the ocean.
Last 24 hours at Kilauea summit: NPS officials observed several small ash ejections yesterday afternoon and some glow fluctuations through the evening. Overnight, incandescence continued to be weak as recorded by the webcam although more than one individual described it as moderate to bright from the Jaggar overlook.
This morning, a white plume is rising from the Halema`uma`u vent and being blown southwestward over the Ka`u Desert. Sulfur dioxide emission rates remained elevated and variable; the most recent average measurement was 1,000 tonnes/day on August 25 compared to a pre-2008 background rate between 150-200 tonnes/day. GOES-WEST imagery shows the plume curving to the southwest inland of the coast this morning at 7:15 am.
Ash production continued. Rock impact, or clatter, sounds were unusually loud this morning during the collection routine.
The summit tiltmeter network recorded a brief DI tilt event; deflation started at 9 am yesterday followed by inflation at 2:18 am this morning. The network of GPS receivers that span the summit recorded contraction followed by extension, coincident with the DI tilt event, across the caldera.
Seismic tremor remained at moderate levels with only a subtle increase during the deflation portion of the ongoing DI tilt event. The number of RB2S2BL earthquakes beneath Halema`uma`u Crater remained at values around 100/d, well above background values of 40/d. Twenty earthquakes were located beneath Kilauea, most beneath the summit caldera.
Last 24 hours at the middle east rift zone vents and flow field: Magma continued to degas through Pu`u `O`o Crater resulting in an emission of 1,800 tonnes/day of sulfur dioxide on August 22, down from a high of 7,100 tonnes/day on July 18 and near background values of about 2,000 tonnes/day. No incandescence was observed within the crater overnight.
The tiltmeter on the north side of Pu`u `O`o cone recorded the DI tilt event about one hour after being recorded at the summit again confirming a direct connection between the two. GPS receivers recorded weak contraction across the crater. Seismic tremor levels subtly decreased near Pu`u `O`o and decreased by more than 30% near the TEB vent during the deflation portion of the DI tilt event.
Lava from the TEB vent and the rootless shield field flows through tubes to the ocean. Yesterday, HVO geologists again observed no active surface flows anywhere on the flow field. Smoldering underbrush was responsible for some smoke mauka of the road within the kipuka between the active flows and the County Viewing Area. The Waikupanaha ocean entry was producing a moderate-sized plume. Evidence of a small collapse was seen just west of the active entry. Overnight, no incandescence was observed from the rift zone to the top of the pali above the abandoned Royal Gardens subdivision. Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 8/26/2008 11:57 PM
Alaska Volcano Observatory
Current Status Report
Tuesday, August 26, 2008 12:33 PM AKDT (20:33 UTC)
KASATOCHI VOLCANO
52°10'9" N 175°30'41" W, Summit Elevation 1030 ft (314 m)
Current Aviation Color Code: ORANGE
Current Volcano Alert Level: WATCH
Seismic activity at Kasatochi volcano continues. Satellite views were cloudy today.
The volcano remains in a restless condition and is hazardous to approach. Further explosive activity remains possible.
OKMOK VOLCANO
53°23'49" N 168°9'58" W, Summit Elevation 3520 ft (1073 m)
Current Aviation Color Code: ORANGE
Current Volcano Alert Level: WATCH
Though continuing to decline, seismic activity at Okmok remains above background levels. Satellite views were cloudy today.
Although the level of seismicity has declined and it appears that ash is no longer being erupted, it is possible for vigorous ash emissions to resume at any time.
CLEVELAND VOLCANO
52°49'20" N 169°56'42" W, Summit Elevation 5676 ft (1730 m)
Current Aviation Color Code: YELLOW
Current Volcano Alert Level: ADVISORY
Satellite and webcam views were cloudy today. AVO has received no additional information about activity at Cleveland.
Eruptive activity may resume at Cleveland volcano without warning.
RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478
CONTACT INFORMATION:
John Power, Acting Scientist-in-Charge, USGS
jpower@usgs.gov (907) 786-7497
Steve McNutt, Coordinating Scientist, UAF
steve@giseis.alaska.edu (907) 474-7131
The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys. Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 8/27/2008 11:56 AM
Montserrat Volcano Observatory
Activity Report – 25 August 2008
[link to www.mvo.ms.]
There was a rainfall-induced pyroclastic flow early on the morning of 25 August 2008. The wind direction was to the North at the time, and ashfall was reported from most of Montserrat.
The flow occurred at approximately 1:10 am local time, after almost one hour of heavy rainfall. The flow was on the western flank of the volcano and lasted for less than 15 minutes. The flow split into two parts. The larger part travelled towards Lee’s Yard, but did not go as far as the flow on 28 July 2008. The other part of the flow travelled in the direction of Plymouth, but stopped before Amersham Estate.
At the time of the flow, the wind was blowing towards the North so there was a strong smell of volcanic gases in most areas of Montserrat. The smell of gases continued to be noticeable throughout the night.
Ashfall was moderate. There was a heavy dusting of dark wet ash in Salem, Olde Town and Olveston. Smaller amounts of ashfall were reported from most of Montserrat, including the airport.
The flow has enlarged and steepened the rockfall gully over the Gages Wall. Because of this, further pyroclastic flows may occur without any warning, especially when there is heavy rainfall.
As the ash dries and residents clean up, the ash will be remobilized in the air. Residents are advised to wear ash-masks when necessary and to take care when driving.
The Hazard Level remains at 3.
MVO, 25 August 2008 Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
This is to notify the public and concerned authorities on the ongoing seismic unrest at Taal Volcano.
The Taal seismic network recorded ten (10) volcanic earthquakes from 5:30 A.M. to 3:00 P.M. today. Two (2) of these quakes that occurred at 12:33 and 12:46 P.M. were both felt at intensity II by residents at barangay Pira-piraso. These quakes were accompanied by rumbling sounds. The events were located northeast of the volcano island near Daang Kastila area with depths of approximately 0.6km (12:33 P.M.) and 0.8km (12:46 P.M.)
Surface thermal observations however, did not indicate significant change in the thermal and steam manifestations of the Main Crater Lake area.
The increase in seismicity at Taal Volcano reflects a low-level episode of unrest. Alert Level 1 remains in effect over Taal Volcano. At present, no imminent eruption is indicated although the public is advised to observe some precautions. In this regard, PHIVOLCS reminds the general public that the Main Crater area is off-limits because steam explosions may suddenly occur. Other hazards within the Main Crater may be the build up of toxic gases in case of more pronounced volcanic reactivation. The northern portion of the Main Crater rim, in the vicinity of Daang Kastila Trail, may also be hazardous, when reactivated with steam emission and increased thermal activity. Furthermore, the public is reminded that Taal Volcano Island is a high-risk area and permanent danger zone, hence, habitation is strictly not recommended.
The shifting seabed: earthquakes off Vancouver Island 28 August 2008
Posted by volcanismblog
[link to volcanism.wordpress.com]
Beneath the North Pacific off the coast of Canada and the north-western United States is one of the most complex tectonic situations on the planet, where the Juan de Fuca Plate is being subducted beneath North American Plate at the Cascadia Subduction Zone. The area is, as might be expected, highly seismically active (recently springing a seismic surprise with an earthquake swarm in the centre of the Juan de Fuca Plate, away from the plate’s boundaries), and is also very effectively monitored, thanks to the United States Navy SOSUS hydrophone network.
More interesting activity is currently under way on the Juan de Fuca seabed, with an earthquake swarm centred on the Explorer Ridge, 240km west of Vancouver Island: the largest quakes have exceeded magnitude 6. In early 2005 extensive seismic swarms were detected around 320km off Vancouver Island: more than 4000 quakes were registered, most small but with some greater than magnitude 4. The tremors occurred in the area known as the Endeavour Ridge, 200km or so south of the Explorer Ridge. Both ridges are characterized by hydrothermal activity, but it is unclear whether the current seismicity is connected in any way to an upsurge in local volcanism. Earthquakes are hardly rare around there anyway, but it’s always worth watching these highly tectonically active parts of the globe.
[Thanks to George Wohanka for information received.]
THIS is cool documentary! UNFORTUNATELY it may cost the creator his job. There are some great shots in the video!
Unauthorized Chaitén ascent gets Chilean geologist into trouble 28 August 2008
Posted by volcanismblog
[link to volcanism.wordpress.com]
An exclusion zone was imposed upon Chaitén volcano almost from the beginning of its eruption back in May, and is still in force, albeit in reduced form. The caldera itself is highly dangerous and remains firmly off-limits to unauthorized persons - and that includes SERNAGEOMIN geologists who haven’t filled in the appropriate forms.
Which is why Daniel Basualto is in trouble. Basualto is a geologist working for the state geological authority, SERNAGEOMIN. From 13 to 15 August he took part in an unauthorized ascent of Chaitén in company with doctor and mountaineer Mauricio Purto and radio announcer (and Chaitén resident) Bernardo Riquelme, and made some dramatic film which has been aired on the Chilean national television network TVN.
Basualto is being investigated by his employers, but is continuing to work while his future is decided (given the small number of professional volcanologists in Chile, they can hardly do without him). Mauricio Purto, meanwhile, claims that the relevant authorities were given advanced notice in writing of the planned ascent, but that the party received no responses to their letters.
It is possible that Basualto is in trouble with SERNAGEOMIN not because of the risks he took or his failure to submit to the demands of bureaucracy, but because his expedition was carried out for publicity reasons rather than for any scientific purpose; he could be accused of having exploited his position as a government geologist to get media attention.
The films made by Basualto and his party can be found at YouTube: ‘A metros del crater del Volcán Chaitén’ and ‘Expedición al volcán Chaitén en erupción’.
[link to volcano.wr.usgs.gov]
HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE
Thursday, August 28, 2008 08:59 HST (Thursday, August 28, 2008 18:59 UTC)
KILAUEA VOLCANO (CAVW#1302-01-)
19.42°N 155.29°W, Summit Elevation 4091 ft (1247 m)
Volcano Alert Level: WATCH
Aviation Color Code: ORANGE
This report on the status of Kilauea volcanic activity, in addition to maps, photos, and webcam images (available using the menu bar above), was prepared by the USGS Hawaiian Volcano Observatory (HVO). Hawai`i Volcanoes National Park status can be found at [link to www.nps.gov]
Activity Summary for last 24 hours: Kilauea summit continued to produce small amounts of ash and elevated amounts of sulfur dioxide gas from the Halema`uma`u vent; a small explosive eruption at 7:37 am on Aug. 27 was confirmed this morning. At the east rift eruption site, Pu`u `O`o cone continued to produce high amounts of sulfur dioxide gas; lava flows through tubes to the ocean.
Last 24 hours at Kilauea summit: The dramatic explosion at 7:37 am noted in yesterday's update (8/27) was actually a very small explosive eruption, the fifth in 2008. This morning's collection yielded volcanic glass bits up to several centimeters across within a deposit that was dominantly rock fragments up to 5 cm (2 inches) across. The tephra was ejected hot and burned holes in a tarp used for collection near the overlook. During the collection routine, the vent was the noisiest in memory with rock impact sounds grading into multiple rock fall sounds.
The NPS eruption crew observed a couple of small ash ejections yesterday, some accompanied by audible noises, and some glow fluctuations through the evening. Overnight, bright incandescence was episodic. This morning, the white plume is rising from the vent and being blown southwest over the Ka`u Desert.
Analysis of photos over the past month showed that the Halema`uma`u vent rim has enlarged almost 50% of its length along the edge of the crater floor; the enlargement appears to have been incremental.
Sulfur dioxide emission rates remained elevated and variable; the most recent average measurement was 600 tonnes/day on August 26 compared to a pre-2008 background rate between 150-200 tonnes/day.
The summit tiltmeter network was back to recording slow deflation. The network of GPS receivers that span the summit recorded weak contraction across the caldera.
Intense, episodic seismic tremor continued; some of the bursts had hybrid earthquake characteristics. The number of RB2S2BL earthquakes beneath Halema`uma`u Crater increased dramatically to over 400/d, well above background values of 40/d; these elevated levels are not quite as high as those reached on Aug. 10 after the 8/5-9 DI tilt event. A high thirty-nine earthquakes were located beneath Kilauea, 29 of them beneath the summit caldera, 5 on south flank faults, 2 on Koa`e faults, one beneath the southwest rift zone, and 2 north of the east rift zone.
Last 24 hours at the middle east rift zone vents and flow field: Magma continued to degas through Pu`u `O`o Crater resulting in an emission of 1,800 tonnes/day of sulfur dioxide on August 22, down from a high of 7,100 tonnes/day on July 18 and near background values of about 2,000 tonnes/day. An incandescent burst was recorded overnight within the central crater just before 4 am.
The tiltmeter on the north side of Pu`u `O`o cone recorded minor oscillations larger in amplitude than the underlying weak deflation. GPS receivers recorded weak contraction across the crater. Seismic tremor levels are at low values near Pu`u `O`o and the TEB vent.
Lava from the TEB vent and the rootless shield field flows through tubes to the ocean. No incandescence was observed overnight from rift zone to the top of the pali above the abandoned Royal Gardens subdivision. MODIS satellite imagery showed a Waikupanaha steam plume through about 2 pm yesterday indicating the entry was active. Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 8/28/2008 10:54 PM
Alaska Volcano Observatory
Information Statement
Thursday, August 28, 2008 3:02 PM AKDT (00:02 UTC)
As a result of more than a week of declining activity at Kasatochi and Okmok volcanoes, beginning at 5 pm ADT today, AVO will scale back its 24-hour monitoring activities that began on July 12 with the eruption of Okmok volcano. The AVO operations room will be staffed during normal business hours (8 am to 5 pm), and the status of the volcanoes will be checked every two hours during non-business hours and on the weekends. AVO will continue to closely monitor activity at Kasatochi, Okmok, and Cleveland volcanoes (those volcanoes at elevated color code) using seismic data, satellite images, internet camera data and observer reports.
AVO may be contacted during non-business hours by calling 907-786-7497 and calls will be directed to the AVO Duty Scientist through our answering service.
RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478
CONTACT INFORMATION:
John Power, Acting Scientist-in-Charge, USGS
jpower@usgs.gov (907) 786-7497
Steve McNutt, Coordinating Scientist, UAF
steve@giseis.alaska.edu (907) 474-7131
The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys. Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 8/29/2008 2:03 PM
Montserrat Volcano Observatory
Weekly Report for the period 22 – 29 August 2008
[link to www.mvo.ms.]
Much of the activity at the Soufriere Hills Volcano this week has been triggered by heavy rainfall on Montserrat, with a pyroclastic flow on 25 August and several lahars. Other observations are consistent with continuing slow extrusion of lava on the western flank of the dome.
There was a rainfall-induced pyroclastic flow at approximately 1:10 am local time on Monday 25 August, after almost one hour of heavy rainfall. The flow was on the western flank of the volcano and lasted for less than 15 minutes. The flow split into two parts. The larger part travelled towards Lee’s Yard, but did not go as far as the flow on 28 July 2008. The other part of the flow was mainly contained in a gully and travelled as far as Amersham.
At the time of the flow, the wind was blowing towards the North so there was a strong smell of volcanic gases in most areas of Montserrat. The smell of gases continued to be noticeable throughout the night.
Ashfall was reported from all parts of Montserrat north of the volcano. Woodlands received the heaviest ashfall, with up to half a centimetre of dark wet ash. There was a heavy dusting of ash in Salem, Olde Town and Olveston.
Lahars in the Belham River and various ghauts around the volcano were recorded on 25, 26 and 27 August. On two occasions, there was a heavy thunderstorm centred on the volcano but no rainfall in inhabited areas. Despite some public concern about volcanic activity, there was none.
On clear nights, several distinct points of red glow can be seen on the dome. Most of these are in the scar that was created by the explosion on 28 July and then excavated by the pyroclastic flow on 25 August. There are at least two areas of glow to the north of this scar which indicate the presence of hot rock near the surface of the dome.
Seismic activity continues. MVO recorded 18 rockfalls, 12 long period, 13 hybrid and 5 volcano-tectonic events this week. Most of the rockfalls were on the western side of the dome. Most of the hybrid and volcano-tectonic events have been recorded since 27 August and are located below the dome, at depths down to 2.5 km.
Reliable measurements of the sulphur dioxide (SO2) flux were only possible for three days at the start of the week because the change in wind direction moved the plume outside the monitoring network. The average flux for the week was 466 tons per day (t/d) with a minimum of 239 and a maximum of 758. These values are lower than those seen since the explosion on 28 July.
Lava extrusion is expected to continue. The extrusion rate has been relatively low since it started on 28 July, but an increase cannot be ruled out. The pyroclastic flow on 25 August has enlarged and steepened the rockfall gully over the Gages Wall. Because of this, further pyroclastic flows may occur without any warning, especially when there is heavy rainfall.
The Hazard Level is 3. Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 8/29/2008 3:17 PM
CASCADES VOLCANO OBSERVATORY WEEKLY UPDATE
Friday, August 29, 2008 11:03 PDT (Friday, August 29, 2008 18:03 UTC)
[link to volcano.wr.usgs.gov]
Cascade Range Volcanoes
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
NOTICE: Mount St. Helens has been at Volcano Alert Level NORMAL and Aviation Color Code GREEN for the past month; therefore, we are migrating from a Mount St. Helens weekly update to a Cascade Range weekly update. As long as all Cascade Range volcanoes are at Normal and Green, we will continue to issue Cascade Range weekly updates. If a Cascade Range volcano shows signs of unrest, we will issue an update for that particular volcano.
Activity Update: All volcanoes in the Cascade Range are at normal levels of background seismicity. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State; Mount Hood, Mount Jefferson, Three Sisters, Newberry Volcano, and Crater Lake, in Oregon; and Medicine Lake, Mount Shasta, and Lassen Peak in northern California.
Recent Observations: Volcano seismicity at Mount St. Helens and elsewhere has remained quiet. Several stations on Mount Rainier (RCM (Camp Muir) in particular) have been noisy off and on since Sunday as winds from several passing storm systems have buffeted the upper elevations of the volcano. CVO crews were in the field at Mount St. Helens, Three Sisters, and Crater Lake this week for site assessments, repairs to existing monitoring stations, deformation surveys, and/or geological studies. Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 8/29/2008 4:00 PM
Chaiten area airport north view. Cloud cover is pretty heavy, but some views through are possible today, enough to see a bit. You can see just where the ash plume is still rising in a few shots. So-So viewing.
[link to www.aipchile.cl] Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 8/29/2008 4:03 PM
LONG VALLEY OBSERVATORY CURRENT STATUS REPORT
Friday, August 29, 2008 09:24 PDT (Friday, August 29, 2008 16:24 UTC)
[link to volcano.wr.usgs.gov]
LONG VALLEY VOLCANIC CENTER VOLCANO (CAVW#1203-14-)
37.70°N 118.87°W, Summit Elevation 11122 ft (3390 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
The real-time computer system located three small earthquakes in the vicinity of Long Valley caldera since the last update at 9:04 AM (PDT) on August 28. Two were located in the Round Valley area and the other in the Sierra Nevada south of the caldera. All had magnitudes less than M=2.0.
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LONG VALLEY OBSERVATORY CURRENT STATUS REPORT
Friday, August 29, 2008 09:04 PDT (Friday, August 29, 2008 16:04 UTC)
LONG VALLEY VOLCANIC CENTER VOLCANO (CAVW#1203-14-)
37.70°N 118.87°W, Summit Elevation 11122 ft (3390 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
The only earthquake in the vicinity of Long Valley caldera located by the real-time computer system since the last update at 9:13 AM on the 28th was a M=1.2 event in the Sierra Nevada SSE of Tom's Place.
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LONG VALLEY OBSERVATORY CURRENT STATUS REPORT
Thursday, August 28, 2008 09:13 PDT (Thursday, August 28, 2008 16:13 UTC)
LONG VALLEY VOLCANIC CENTER VOLCANO (CAVW#1203-14-)
37.70°N 118.87°W, Summit Elevation 11122 ft (3390 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
The only earthquake in the vicinity of Long Valley caldera located by the real-time computer system since the last update at 9:22 AM on the 27th was a M=0.9 event at 4:42 AM on the 28th beneath the Benton Range 5 miles east of the caldera (9 miles NNE of Tom's Place).
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LONG VALLEY OBSERVATORY CURRENT STATUS REPORT
Wednesday, August 27, 2008 09:22 PDT (Wednesday, August 27, 2008 16:22 UTC)
LONG VALLEY VOLCANIC CENTER VOLCANO (CAVW#1203-14-)
37.70°N 118.87°W, Summit Elevation 11122 ft (3390 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
The realtime detection system located two small earthquakes in Long Valley caldera and vicinity since the last update at 11:25 AM (PDT) on August 26. Both were in the Sierra Nevada south of the caldera; the largest was a M=1.5 earthquake at 2:06 PM on the 26th located 6 miles SSW of Tom's Place.
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LONG VALLEY OBSERVATORY CURRENT STATUS REPORT
Tuesday, August 26, 2008 11:25 PDT (Tuesday, August 26, 2008 18:25 UTC)
LONG VALLEY VOLCANIC CENTER VOLCANO (CAVW#1203-14-)
37.70°N 118.87°W, Summit Elevation 11122 ft (3390 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
The realtime detection system located no earthquakes in Long Valley caldera and vicinity since the last update at 9:19 AM (PDT) on August 25.
Elsewhere, low-level earthquake activity in the northern Owens Valley area 6 to 7 miles SE of Bishop has continued including a M=3.4 earthquake at 2:33 PM on the 25th accompanied by M=2.5 earthquakes at 2:16 and 2:40 PM plus a number of small events. The most recent in this sequence was a M=2.1 earthquake at 8:17 PM on the 25th. Further to the north, a M=2.0 earthquake at 5:18 PM on the 25th was located in the Chalfant Valley area 11 miles north of Bishop.
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LONG VALLEY OBSERVATORY CURRENT STATUS REPORT
Monday, August 25, 2008 09:19 PDT (Monday, August 25, 2008 16:19 UTC)
LONG VALLEY VOLCANIC CENTER VOLCANO (CAVW#1203-14-)
37.70°N 118.87°W, Summit Elevation 11122 ft (3390 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
The realtime detection system located no earthquakes in Long Valley caldera and vicinity since the last update at 10:13 AM (PDT) on August 24.
Elsewhere, magnitude M=1.5 and M=1.7 earthquakes at 9:03 PM on the 24th and 9:06 AM on the 25th, respectively, were located 2 and 6 miles southeast of Bishop.
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LONG VALLEY OBSERVATORY CURRENT STATUS REPORT
Sunday, August 24, 2008 10:13 PDT (Sunday, August 24, 2008 17:13 UTC)
LONG VALLEY VOLCANIC CENTER VOLCANO (CAVW#1203-14-)
37.70°N 118.87°W, Summit Elevation 11122 ft (3390 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
The realtime detection system located two small earthquakes in Long Valley caldera and vicinity since the last update at 8:51 AM (PDT) on August 23. A M=0.7 earthquake was located in the Sierra Nevada south of the caldera (4 miles SE of Mammoth Lakes). The largest was a M=1.1 earthquake at 7:30 PM on the 23rd beneath the flat between Lake Crowley and Highway 395 (5 miles WNW of Tom's Place)
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LONG VALLEY OBSERVATORY CURRENT STATUS REPORT
Saturday, August 23, 2008 08:51 PDT (Saturday, August 23, 2008 15:51 UTC)
LONG VALLEY VOLCANIC CENTER VOLCANO (CAVW#1203-14-)
37.70°N 118.87°W, Summit Elevation 11122 ft (3390 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
The realtime detection system located two small earthquakes in Long Valley caldera and vicinity since the last update at 9:09 AM (PDT) on August 22. Both had magnitudes of M=1.6. One was located beneath the northern section of Round Valley and the other in the Sierra Nevada 7 miles ESE of Mammoth Lakes.
Elsewhere, M=2.7 and M=2.8 earthquakes at 2:59 PM and 3:02 PM on the 22nd were centered in the northern Owens Valley 6 miles SE of Bishop.
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The Long Valley Observatory (LVO) monitors and studies earthquakes, ground deformation, degassing, and other types of geologic unrest in and around the Long Valley Caldera. The 15 by 30 km Long Valley Caldera was formed during an eruption 760,000 years ago and is located 20 km south of Mono Lake along the east side of the Sierra Nevada in east-central California. There have been multiple smaller eruptions since the caldera-forming eruption with the most recent occurring 250 years ago in Mono Lake at the north end of Mono-Inyo Craters volcanic chain. LVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety. Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 8/30/2008 12:31 AM
KASATOCHI VOLCANO
52°10'9" N 175°30'41" W, Summit Elevation 1030 ft (314 m)
Current Aviation Color Code: ORANGE
Current Volcano Alert Level: WATCH
Seismic activity at Kasatochi volcano continues to slowly decline following the eruptions on August 7. Possible intermittent tremor occurred for several hours on August 27 and was detected by the AVO seismic network on Great Sitkin Island 25 miles west of Kasatochi. Satellite views were cloudy this week.
The volcano remains in a restless condition and is hazardous to approach. Further explosive activity remains possible.
OKMOK VOLCANO
53°23'49" N 168°9'58" W, Summit Elevation 3520 ft (1073 m)
Current Aviation Color Code: YELLOW
Current Volcano Alert Level: ADVISORY
Seismicity at Okmok volcano has declined and significant ash plumes have not been observed since August 19. The Aviation Color Code/Alert Level was reduced to YELLOW/Advisory on August 27. A clear satellite view on August 28 showed a weak steam plume and a weak thermal anomaly. Although the level of seismicity has declined and it appears that ash is no longer being erupted, it is possible for vigorous ash emissions to resume at any time.
Visual observations of the caldera floor made on August 23 indicate that low level eruptive activity has also likely stopped. It is possible for vigorous ash emissions to resume at any time.
CLEVELAND VOLCANO
52°49'20" N 169°56'42" W, Summit Elevation 5676 ft (1730 m)
Current Aviation Color Code: YELLOW
Current Volcano Alert Level: ADVISORY
Satellite views were most cloudy this week. A weak thermal anomaly was detected on August 24. The lack of recent activity prompted AVO to lower the Aviation Color Code/Alert Level to YELLOW on August 25.
Eruptive activity may resume at Cleveland volcano without warning.
CONTACT INFORMATION:
John Power, Acting Scientist-in-Charge, USGS
jpower@usgs.gov (907) 786-7497
Steve McNutt, Coordinating Scientist, UAF
steve@giseis.alaska.edu (907) 474-7131
The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys. Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 8/30/2008 12:35 AM
HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE
Friday, August 29, 2008 07:34 HST (Friday, August 29, 2008 17:34 UTC)
[link to volcano.wr.usgs.gov]
KILAUEA VOLCANO (CAVW#1302-01-)
19.42°N 155.29°W, Summit Elevation 4091 ft (1247 m)
Volcano Alert Level: WATCH
Aviation Color Code: ORANGE
This report on the status of Kilauea volcanic activity, in addition to maps, photos, and webcam images (available using the menu bar above), was prepared by the USGS Hawaiian Volcano Observatory (HVO). Hawai`i Volcanoes National Park status can be found at [link to www.nps.gov]
Activity Summary for last 24 hours: Kilauea summit continued to produce small amounts of ash and elevated amounts of sulfur dioxide gas from the Halema`uma`u vent. At the east rift eruption site, Pu`u `O`o cone continued to produce high amounts of sulfur dioxide gas; lava flows through tubes to the ocean.
Last 24 hours at Kilauea summit: The Halema`uma`u vent was very noisy yesterday with multiple rock impact sounds becoming frequent and loud in time with the episodic seismic tremor bursts. Some of these sounds were heard by NPS eruption crew personnel at Jaggar Museum overlook. In the evening, incandescence could be seen to also pulse in time with those bursts; the brightness decreased considerably after 1 am, just after the episodic tremor bursts stopped (see below).
This morning, the white plume is rising from the vent and being blown southwest over the Ka`u Desert. Ash production continued; the collection this morning included increased amounts of volcanic glass material in the form of small tears and blobs, delicate and coarse hair, and irregular shreds, some like twisted braids and some in irregular shapes. Wall rock and alteration fragments were still part of the mix.
Sulfur dioxide emission rates remained elevated and variable; the most recent average measurement was 700 tonnes/day on August 28 compared to a pre-2008 background rate between 150-200 tonnes/day.
The summit tiltmeter network recorded minor oscillations. The network of GPS receivers that span the summit recorded weak contraction across the caldera.
Episodic seismic tremor stopped at 00:45 am this morning, after having been nearly continuous for more than 48 hours; this morning, tremor levels resumed at values nearly identical to those before the episodic tremor began. The number of RB2S2BL earthquakes beneath Halema`uma`u Crater decreased but are still well above background values of 40/d. Forty two earthquakes were located beneath Kilauea, 31 of them beneath the summit caldera focused on the Halema`uma`u vent, 6 on south flank faults, 5 on Koa`e faults, andfour beneath the southwest rift zone. Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Chaiten area airport north view. Cloud cover is moderate and high today. You can see a nice and reasonable large plume coming off the volcano in some of the shots. Good viewing today.
Alaska Volcano Observatory
Current Status Report
Saturday, August 30, 2008 12:42 PM AKDT (20:42 UTC)
KASATOCHI VOLCANO
52°10'9" N 175°30'41" W, Summit Elevation 1030 ft (314 m)
Current Aviation Color Code: ORANGE
Current Volcano Alert Level: WATCH
Seismic activity at Kasatochi volcano continues to slowly decline following the eruptions on August 7. Satellite views are cloudy today.
The volcano remains in a restless condition and is hazardous to approach. Further explosive activity remains possible.
OKMOK VOLCANO
53°23'49" N 168°9'58" W, Summit Elevation 3520 ft (1073 m)
Current Aviation Color Code: YELLOW
Current Volcano Alert Level: ADVISORY
Seismicity at Okmok volcano has declined and significant ash plumes have not been observed since August 19.
It is possible for vigorous ash emissions to resume at any time.
CLEVELAND VOLCANO
52°49'20" N 169°56'42" W, Summit Elevation 5676 ft (1730 m)
Current Aviation Color Code: YELLOW
Current Volcano Alert Level: ADVISORY
Satellite views are cloudy today.
Eruptive activity may resume at Cleveland volcano without warning.
OTHER ALASKA VOLCANOES
Seismic activity is monitored in real time at 30 volcanoes in Alaska. Satellite images of all Alaskan volcanoes are analyzed daily for evidence of ash plumes and elevated surface temperatures. Some volcanoes may currently display anomalous behavior but are not considered to be at a dangerous level of unrest. Augustine, Iliamna, Redoubt, Wrangell, Gareloi, Great Sitkin, Makushin, Fisher, Shishaldin, Isanotski, Pavlof, Veniaminof, Ugashik-Peulik, Griggs, Snowy, Fourpeaked, Aniakchak, Tanaga, Kanaga, Akutan, Westdahl, Dutton, Ukinrek Maars, Martin, Mageik, Trident, Katmai, Novarupta, Spurr, and Korovin volcanoes are in color code GREEN and volcano alert level Normal. All are at or near normal levels of background seismicity. AVO did not detect ash plumes or significant elevated surface temperatures in the vicinity of any volcano.
VOLCANO INFORMATION ON THE INTERNET: [link to www.avo.alaska.edu]
RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478
CONTACT INFORMATION:
John Power, Acting Scientist-in-Charge, USGS
jpower@usgs.gov (907) 786-7497
Steve McNutt, Coordinating Scientist, UAF
steve@giseis.alaska.edu (907) 474-7131
The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys. Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 8/31/2008 9:32 PM
[link to volcano.wr.usgs.gov]
HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE
Sunday, August 31, 2008 07:22 HST (Sunday, August 31, 2008 17:22 UTC)
KILAUEA VOLCANO (CAVW#1302-01-)
19.42°N 155.29°W, Summit Elevation 4091 ft (1247 m)
Volcano Alert Level: WATCH
Aviation Color Code: ORANGE
This report on the status of Kilauea volcanic activity, in addition to maps, photos, and webcam images (available using the menu bar above), was prepared by the USGS Hawaiian Volcano Observatory (HVO). Hawai`i Volcanoes National Park status can be found at [link to www.nps.gov]
Activity Summary for last 24 hours: Kilauea summit continued to produce small amounts of ash and elevated amounts of sulfur dioxide gas from the Halema`uma`u vent. At the east rift eruption site, Pu`u `O`o cone continued to produce high amounts of sulfur dioxide gas; lava flows through tubes to the ocean.
Last 24 hours at Kilauea summit: They weren't gone long - episodic tremor returned to the summit at 3:50 pm yesterday followed by two hybrid/explosion earthquakes at 7:03 and 8:38 pm; the first hybrid event produced an ash-rich brown plume and a bright flash of incandescence. Regular bright incandescence returned to the vent around 10 pm and was clearly pulsing episodically by early morning.
This morning, the white plume is rising from the vent and being blown high and southwest over the Ka`u Desert. GOES-WEST images show the plume extending southwest inland of the coast.
Ash production continued; this morning's collection yielded a few bits of volcanic glass. Abundant sounds of nearly continuous rock clatter were back with some sequences resembling the sounds of rocks clattering down a talus pile.
Sulfur dioxide emission rates remained elevated and variable; the most recent average measurement was 700 tonnes/day on August 28 compared to a pre-2008 background rate between 150-200 tonnes/day.
The summit tiltmeter network recorded minor oscillations. The network of GPS receivers that span the summit recorded no net contraction or extension across the caldera for the past week.
Seismic tremor levels continued at moderate values until 3:50 pm when episodic tremor returned; two small hybrid/explosion earthquakes were recorded. The number of RB2S2BL earthquakes beneath Halema`uma`u Crater started to increase after the start of episodic tremor and is now more than 350/d, well above background values of 40/d. 73 earthquakes were located beneath Kilauea or nearby including 41 beneath the southeast summit caldera focused on the Halema`uma`u ventand 8 on south flank faults.
Last 24 hours at the middle east rift zone vents and flow field: Magma continued to degas through Pu`u `O`o Crater resulting in an emission of 1,500 tonnes/day of sulfur dioxide on August 28, down from a high of 7,100 tonnes/day on July 18 and near background values of about 2,000 tonnes/day. No incandescence was observed overnight within the crater.
The tiltmeter on the north side of Pu`u `O`o cone recorded minor oscillations over weak deflation spanning the last four days. GPS receivers recorded weak contraction across the crater over the past week. Seismic tremor levels are at low values and continuing to decrease near Pu`u `O`o and the TEB vent.
Lava from the TEB vent and the rootless shield field flows through tubes to the ocean. No incandescence was observed overnight from rift zone to the top of the pali above the abandoned Royal Gardens subdivision. GOES-WEST imagery shows no thermal anomalies (suggesting no significant surface flow activity) and a distinct steam plume blowing offshore this morning at 6:45 am. Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 9/1/2008 10:35 AM
Sunday, August 31, 2008
Nyiragongo Volcano, Democratic Republic of Congo -
Nyiragongo volcano in Democratic Republic of Congo was visited by John Seach in August 2008. An active lava lake was observed in the summit crater. Lava fountaining and strong degassing was observed from the surface of the lava lake.
Chaiten Volcano, Chile -
Chaiten volcano was visited by John Seach from 22nd to 26th August 2008. During a summit climb, an active lava dome was observed in the summit crater. The dome was about 120 m high and produced lava avalanches, and loud roaring noises. Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 9/2/2008 10:55 AM
HAWAIIAN VOLCANO OBSERVATORY BIWEEKLY UPDATE
Monday, September 1, 2008 10:09 HST (Monday, September 1, 2008 20:09 UTC)
[link to volcano.wr.usgs.gov]
MAUNA LOA VOLCANO (CAVW#1302-02=)
19.48°N 155.61°W, Summit Elevation 13681 ft (4170 m)
Volcano Alert Level: ADVISORY
Aviation Color Code: YELLOW
Report prepared by the Hawaiian Volcano Observatory:
Mauna Loa is not erupting. Slow extension, as measured by GPS receivers on opposite sides of the volcano, continued.
Tiltmeters have recorded no significant changes other than abrupt offsets that are related to instrumental issues.
Sensors within a crack in Moku`aweoweo crater floor continued to record background gas concentrations and temperatures.
Since the beginning of January, 2005, HVO analysts have rarely located more than 10 earthquakes per week beneath Mauna Loa summit. Each week, 1-5 earthquakes are also located beneath the Kealakekua area of west Mauna Loa. These levels are typical of the past several years. The Kao`iki seismic zone between Mauna Loa and Kilauea volcano summits remained active with an average of about 30-50 earthquakes per week; the increase may reflect increased seismic activity nearer Kilauea summit rather than increased Kao`iki activity. Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE
Tuesday, September 2, 2008 06:13 HST (Tuesday, September 2, 2008 16:13 UTC)
[link to volcano.wr.usgs.gov]
KILAUEA VOLCANO (CAVW#1302-01-)
19.42°N 155.29°W, Summit Elevation 4091 ft (1247 m)
Volcano Alert Level: WATCH
Aviation Color Code: ORANGE
This report on the status of Kilauea volcanic activity, in addition to maps, photos, and webcam images (available using the menu bar above), was prepared by the USGS Hawaiian Volcano Observatory (HVO). Hawai`i Volcanoes National Park status can be found at [link to www.nps.gov]
Activity Summary for last 24 hours: Kilauea summit continued to produce small amounts of ash and elevated amounts of sulfur dioxide gas from the Halema`uma`u vent. At the east rift eruption site, Pu`u `O`o cone continued to produce high amounts of sulfur dioxide gas; lava flows through tubes to the ocean.
Last 24 hours at Kilauea summit: Overnight, the webcam barely recorded incandescence from the vent. This morning, a white plume is rising from the vent and being blown southwest over the Ka`u Desert.
Sulfur dioxide emission rates remained elevated and variable; the most recent average measurement was 700 tonnes/day on August 28 compared to a pre-2008 background rate between 150-200 tonnes/day.
The summit tiltmeter network recorded minor oscillations over weak deflation; a few of the hybrid earthquakes produced small offsets. The network of GPS receivers that span the summit recorded weak contraction across the caldera.
Episodic seismic tremor sputtered out around 9 am and levels returned to moderate values; six hybrd/explosion earthquakes were recorded at 10:20 am and 11:12 pm yesterday and 2:34, 5:24, 5:35 and 5:45 am today. The number of RB2S2BL earthquakes beneath Halema`uma`u Crater continued to decrease but was still well above background values of 40/d. 74 earthquakes were located beneath Kilauea or nearby including 40 beneath the southeast summit caldera focused on the Halema`uma`u vent, 20 beneath the southwest rift zone and adjacent areas, and 4 on south flank faults.
Last 24 hours at the middle east rift zone vents and flow field: Magma continued to degas through Pu`u `O`o Crater resulting in an emission of 1,500 tonnes/day of sulfur dioxide on August 28, down from a high of 7,100 tonnes/day on July 18 and near background values of about 2,000 tonnes/day. No incandescence was observed overnight within the crater.
The tiltmeter on the north side of Pu`u `O`o cone recorded minor oscillations over weak deflation. GPS receivers recorded weak contraction across the crater over the past week. Seismic tremor levels are at low values and continuing to decrease near Pu`u `O`o and the TEB vent.
Lava from the TEB vent and the rootless shield field flows through tubes to the ocean. No incandescence was observed overnight from rift zone to the top of the pali above the abandoned Royal Gardens subdivision. GOES-WEST imagery showed no thermal anomalies (no significant surface flow activity).
Geogal Hu ka pele, lava pour forth User ID: 373387 9/2/2008 10:31 PM
Alaska Volcano Observatory
Current Status Report
Tuesday, September 2, 2008 12:35 PM AKDT (20:35 UTC)
KASATOCHI VOLCANO
52°10'9" N 175°30'41" W, Summit Elevation 1030 ft (314 m)
Current Aviation Color Code: ORANGE
Current Volcano Alert Level: WATCH
Seismic activity at Kasatochi volcano continues to slowly decline following the eruptions on August 7. Satellite views are cloudy today.
The volcano remains in a restless condition and is hazardous to approach. Eruptive activity could resume at any time.
OKMOK VOLCANO
53°23'49" N 168°9'58" W, Summit Elevation 3520 ft (1073 m)
Current Aviation Color Code: YELLOW
Current Volcano Alert Level: ADVISORY
Seismicity at Okmok remains low. Satellite views today are obscured by clouds.
It is possible for eruptive activity to resume at any time.
CLEVELAND VOLCANO
52°49'20" N 169°56'42" W, Summit Elevation 5676 ft (1730 m)
Current Aviation Color Code: YELLOW
Current Volcano Alert Level: ADVISORY
Satellite views are cloudy today.
Eruptive activity may resume at Cleveland volcano without warning.
RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478
CONTACT INFORMATION:
John Power, Acting Scientist-in-Charge, USGS
jpower@usgs.gov (907) 786-7497
Steve McNutt, Coordinating Scientist, UAF
steve@giseis.alaska.edu (907) 474-7131
The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys. Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 9/3/2008 12:18 AM
YELLOWSTONE VOLCANO OBSERVATORY MONTHLY UPDATE
Tuesday, September 2, 2008 13:31 MDT (Tuesday, September 2, 2008 19:31 UTC)
[link to volcano.wr.usgs.gov]
YELLOWSTONE VOLCANO (CAVW#1205-01-)
44.43°N 110.67°W, Summit Elevation 9203 ft (2805 m)
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
AUGUST 2008 Yellowstone Seismicity Summary
During the month of August 2008, 146 earthquakes were located in the Yellowstone region. The largest event was a magnitude 2.3 on August 31 at 7:31 AM MDT, located about 17 miles west northwest of West Yellowstone, MT. Three swarms occurred during the month of August. The first was a continuation of of a swarm that started July 28th on the Madison Plateau. The swarm continued until August 5th with an additional 52 events with magnitudes from -0.4 to 2.1, bringing the total for the swarm to 184 earthquakes. The second swarm, between Aug 3 and 7, included 28 events and was located 16 miles east northeast of West Yellowstone, MT with magnitudes 0.0 to 1.4. The third swarm on August 7 and 8 included 32 events, and was located 6 miles southeast of West Thumb. Magnitudes ranged from 0.0 to 2.1.
Earthquake activity in the Yellowstone region is at relatively low background levels.
Ground Deformation Summary: Through August 2008, continuous GPS data show that much of the Yellowstone caldera continued moving upward, though at a lower rate than the past several years. The maximum measured ground uplift over the past 48 months is ~20 cm at the White Lake GPS station. An example can be found at: [link to pboweb.unavco.org]
The general uplift of the Yellowstone caldera is scientifically interesting and will continue to be monitored closely by YVO staff.
An article on the current uplift episode at Yellowstone and discussion of long-term ground deformation at Yellowstone and elsewhere can be found at: [link to volcanoes.usgs.gov]
-----
The Yellowstone Volcano Observatory (YVO) is a partnership of the U.S. Geological Survey (USGS), Yellowstone National Park, and University of Utah to strengthen the long-term monitoring of volcanic and earthquake unrest in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety. Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 9/3/2008 12:41 PM
Whether this is a coincidence or not, I thought I’d mention a report of an earthquake near the crater of Nevado del Huila in Colombia. The earthquake is reported as a magnitude 4.6 and at a depth of 20 km (although that is only a rough estimate), indicating that magma might be moving up the conduit system under the volcano - or that it might be just coincidental seismicity in a seismically active area. However, Huila had recently become active for the first time in 500 years, so this could be a sign of new activity to come. Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 9/3/2008 12:45 PM
Crystals Improve Understanding Of Volcanic Eruption Triggers
Posted on September 3, 2008 by cosmicbob
[link to volcanoworld.wordpress.com]
The team, from Durham University and the University of Leeds, studied crystal formation from a volcano, in Santorini, in Greece, to calculate the timescale between the trigger of volcanic activity and the volcano’s eruption.
Lead author Dr Victoria Martin, of Durham University, showed that the crystal rims reacted with molten rock, or magma, as it moved into the volcano’s shallow chamber prior to eruption. This process is thought to be associated with shallow level earthquake activity, as shown by modern volcano monitoring.
By studying the area between the crystal core and the rim the team then worked out how long the rims had existed – revealing how long the magma was in the shallow chamber before it erupted.
They say the technique can be applied to other volcanoes – such as Vesuvius, near Naples, in Italy – and will help inform the decisions of civil defence agencies.
Full article
[link to www.sciencedaily.com] Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 9/3/2008 11:39 PM
If anyone is interested in learning a bit more about volcanoes and volcanology, August PubVolc Online is a digest of articles submitted for public information. Lots of great info, interesting stuff, but not really current eruptions.
[link to www.pubvolc.net] Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 9/4/2008 12:06 AM
HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE
Wednesday, September 3, 2008 07:56 HST (Wednesday, September 3, 2008 17:56 UTC)
KILAUEA VOLCANO (CAVW#1302-01-)
19.42°N 155.29°W, Summit Elevation 4091 ft (1247 m)
Volcano Alert Level: WATCH
Aviation Color Code: ORANGE
This report on the status of Kilauea volcanic activity, in addition to maps, photos, and webcam images (available using the menu bar above), was prepared by the USGS Hawaiian Volcano Observatory (HVO). Hawai`i Volcanoes National Park status can be found at [link to www.nps.gov]
Activity Summary for last 24 hours: Kilauea summit continued to produce tephra and elevated amounts of sulfur dioxide gas from the Halema`uma`u vent; an explosive eruption occurred yesterday evening producing mostly volcanic glass; a DI tilt event is nearing completion. At the east rift eruption site, Pu`u `O`o cone continued to produce high amounts of sulfur dioxide gas; lava flows through tubes to the ocean.
Last 24 hours at Kilauea summit: A hybrid/explosion earthquake produced a dense, brown plume starting at 2:46 pm that was witnessed by many at the Jaggar Overlook. Overnight, the webcam captured two more spectacular explosions at 8:13 and 10 pm. This morning's tephra collection revealed that one or both of the overnight events ejected lots of tephra - mostly volcanic glass with a minor amount of rock fragments and dust; some of the twisted glass bits were over 10 cm (4 inches) long, many hit the ground while still hot molding themselves on whatever they fell. This is the sixth explosive eruption of Halema`uma`u.
There have been more changes at the vent. Close analysis of the webcam and timelapse images have concluded that the prominent boulder poised at the lip of the Halema`uma`u vent dropped in during the 5:21 am hybrid earthquake yesterday morning, September 2. The other prominent boulder also on the rim is absent this morning probably as a result of last nights explosive eruption; both disappearances suggest that the vent is sporadically widening into the crater.
This morning, a white plume is rising from the vent and being blown southwest over the Ka`u Desert. GOES-WEST imagery shows the plume extending due southwest and well inland of the coast all the way to South Point.
Sulfur dioxide emission rates remained elevated and variable; the most recent average measurement was 700 tonnes/day on September 2 compared to a pre-2008 background rate between 150-200 tonnes/day.
The summit tiltmeter network recorded four offsets due to single or sequences of hybrid earthquakes before midnight followed by the inflation portion of an unusual DI tilt event starting just before 5 am; the deflation portion was weak, started around 4 pm on September 1, and was not accompanied by an increase in seismic tremor as is typical. The network of GPS receivers that span the summit recorded weak contraction across the caldera.
Seismic tremor remained at moderate values; seven hybrd/explosion earthquakes were recorded between 2:46 pm (generated brown plume) and 10 pm (spectacular incandescence on webcam). The number of RB2S2BL earthquakes beneath Halema`uma`u Crater continued to decrease to less than 200/d but still well above background values of less than 40/d. 39 earthquakes were located beneath Kilauea or nearby including 18 beneath the southeast summit caldera focused on the Halema`uma`u vent, 7 beneath the area immediately west of the summit, 2 beneath the lower southwest rift zone, 4 beneath the east rift zone, and 8 on south flank faults.
Last 24 hours at the middle east rift zone vents and flow field: Magma continued to degas through Pu`u `O`o Crater resulting in an emission of 1,500 tonnes/day of sulfur dioxide on August 28, down from a high of 7,100 tonnes/day on July 18 and near background values of about 2,000 tonnes/day. No incandescence was observed overnight within the crater.
The tiltmeter on the north side of Pu`u `O`o cone recorded a well delayed response to the summit DI tilt event. GPS receivers recorded weak contraction across the crater over the past week. Seismic tremor levels are at low values near Pu`u `O`o and continuing to decrease near the TEB vent; tremor values have dropped by 50% over the past week.
Lava from the TEB vent and the rootless shield field flows through tubes to the ocean. Yesterday, HVO geologists reported a single ocean entry at Waikupanaha with no explosive activity and no surface flows. No incandescence was observed overnight from rift zone to the top of the pali above the abandoned Royal Gardens subdivision. GOES-WEST imagery showed no thermal anomalies (no significant surface flow activity). Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 9/4/2008 12:12 AM
and last but not least for today is info from Alaska!
Alaska Volcano Observatory
Current Status Report
Wednesday, September 3, 2008 12:08 PM AKDT (20:08 UTC)
KASATOCHI VOLCANO
52°10'9" N 175°30'41" W, Summit Elevation 1030 ft (314 m)
Current Aviation Color Code: ORANGE
Current Volcano Alert Level: WATCH
Seismic activity at Kasatochi volcano continues to slowly decline following the eruptions on August 7. Satellite views are cloudy today.
The volcano remains in a restless condition and is hazardous to approach. Eruptive activity could resume at any time.
OKMOK VOLCANO
53°23'49" N 168°9'58" W, Summit Elevation 3520 ft (1073 m)
Current Aviation Color Code: YELLOW
Current Volcano Alert Level: ADVISORY
Seismicity at Okmok remains low. Satellite views today are obscured by clouds.
It is possible for eruptive activity to resume at any time.
CLEVELAND VOLCANO
52°49'20" N 169°56'42" W, Summit Elevation 5676 ft (1730 m)
Current Aviation Color Code: YELLOW
Current Volcano Alert Level: ADVISORY
Satellite views are cloudy today.
Eruptive activity may resume at Cleveland volcano without warning.
RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478
CONTACT INFORMATION:
John Power, Acting Scientist-in-Charge, USGS
jpower@usgs.gov (907) 786-7497
Steve McNutt, Coordinating Scientist, UAF
steve@giseis.alaska.edu (907) 474-7131
The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys. Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Anonymous Coward User ID: 422858 9/4/2008 12:14 AM
[link to volcano.wr.usgs.gov]
HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE
Thursday, September 4, 2008 08:25 HST (Thursday, September 4, 2008 18:25 UTC)
KILAUEA VOLCANO (CAVW#1302-01-)
19.42°N 155.29°W, Summit Elevation 4091 ft (1247 m)
Volcano Alert Level: WATCH
Aviation Color Code: ORANGE
This report on the status of Kilauea volcanic activity, in addition to maps, photos, and webcam images (available using the menu bar above), was prepared by the USGS Hawaiian Volcano Observatory (HVO). Hawai`i Volcanoes National Park status can be found at [link to www.nps.gov]
Activity Summary for last 24 hours: Kilauea summit continued to produce increased amounts of tephra and elevated amounts of sulfur dioxide gas from the Halema`uma`u vent; episodic seismic tremor and incandescence has returned. At the east rift eruption site, Pu`u `O`o cone continued to produce high amounts of sulfur dioxide gas; lava flow was interrupted yesterday to the ocean entry but surface flow activity has started this morning.
Last 24 hours at Kilauea summit: The plume turned brown with ash at least twice during the day. Overnight, the plume was very bright and pulsed with the regularity of the episodic seismic tremor that started just after noon. This morning, a white plume is rising from the vent and being blown southwest over the Ka`u Desert. GOES-WEST imagery shows the plume extending due southwest well inland of the coast.
Sulfur dioxide emission rates remained elevated and variable; the most recent average measurement was 1,300 tonnes/day on September 3 compared to a pre-2008 background rate between 150-200 tonnes/day.
The plume continued to produce increased amounts of ash; this morning's collection consisted of small glass bits and Pele's hair along with the ubiquitous rock dust. The collection team was actually subjected to falling ash during their morning visit. More vent sounds were heard although more subdued than recent mornings; a new sound was added to the list - best described as a 'squeaking or high-pitched scraping noise, as if rocks were sliding past one another.'
The summit tiltmeter network recorded decreasing inflation since yesterday morning. The network of GPS receivers that span the summit recorded weak-to-no contraction across the caldera.
Seismic tremor remained at moderate values until episodic tremor started at 12:36 pm. The number of RB2S2BL earthquakes beneath Halema`uma`u Crater remained below 200/d still well above background values of less than 40/d. Twenty one earthquakes were located beneath Kilauea or nearby including 12 beneath the southeast summit caldera focused on the Halema`uma`u vent, 4 beneath the lower southwest rift zone, 1 beneath the TEB vent area, and 4 on south flank faults.
Last 24 hours at the middle east rift zone vents and flow field: Magma continued to degas through Pu`u `O`o Crater resulting in an emission of 1,500 tonnes/day of sulfur dioxide on August 28, down from a high of 7,100 tonnes/day on July 18 and near background values of about 2,000 tonnes/day. No incandescence was observed overnight within the crater.
The tiltmeter on the north side of Pu`u `O`o cone recorded inflation until about 4 am. GPS receivers recorded contraction across the crater during the deflation and weak extension during the inflation portion of the recent DI tilt event. Seismic tremor levels are at low values but started to increase near Pu`u `O`o and the TEB vent.
Lava from the TEB vent and the rootless shield field flows through tubes to the ocean. CD officials reported a disappearance of the ocean entry plume yesterday. No incandescence was observed overnight from rift zone to the top of the pali above the abandoned Royal Gardens subdivision. GOES-WEST imagery showed a large thermal anomaly on the coastal plain this morning; an HVO crew is en route to investigate. The drop in ocean entry vigor and the subsequent increase in surface activity, indicating resupply of lava to the tube system, is an expected result of the recent DI tilt event. Woman of white garment, foreign woman, earth-eating woman, taking and giving life, she is Pele
"ONCE IN HIS LIFE, EVERY MAN IS ENTITLED TO FALL MADLY IN LOVE WITH A GORGEOUS REDHEAD" - LUCILLE BALL
Geogal Hu ka pele, lava pour forth User ID: 373387 9/4/2008 4:49 PM
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