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Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373

 
Anonymous Coward
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04/28/2017 02:31 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Magnitude 3.1
Region OFFSHORE VALPARAISO, CHILE
Date time 2017-04-28 18:18:01.0 UTC
Location 33.31 S ; 71.87 W
Depth 20 km

[link to m.emsc.eu]
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
A M~8.3 Chile earthquake has become more likely
Since 22 April 2017, an earthquake swarm has been in progress offshore the port city of Valparaíso, which has been widely felt in Chile’s capital, Santiago. This sequence began with a M=6.0, and was followed two days later on 24 April, by a M=6.9 earthquake in the same swarm cluster. What are the implications of the swarm, in light of historical earthquakes in the region, for what may happen next?

Geological Disneyland
Large mega thrust earthquakes are one of three dramatic consequences of the ‘Nazca’ oceanic plate being shoved under the South American continent at about 80 mm/yr (3 in/yr). The second consequence of this ‘subduction’ is the compression and uplift of the Andes, and the third is the string of Pacific rim volcanoes. The Chilean coastline has suffered repeated great earthquakes over the 500 year or so of its recorded history. The largest earthquake ever recorded, a M=9.5 in 1960, occurred 570 km (350 mi) south of Santiago in southern Chile. So, while coastal Chile is subject to earthquakes, Eastern Chile, along its frontier with Argentina, to eruptions.

How big could the next shock be?
This week’s seismic swarm struck in the center of a 300-km-long span of the mega thrust hemmed in by two recent great quakes. In 2010, the M=8.8 Maule earthquake ruptured the region to the south, and in 2015, the M=8.3 Illapel earthquake ruptured to the north (Melgar et al., 2016). The last large earthquakes to have occurred within this span were in 1971 (M=7.9) and 1985 (M=8.0), and so 50-60 years have since elapsed. Because the long term subduction, or slip rate on the mega thrust, is about 80 mm/yr, a deficit of roughly 4-5 m of slip has accumulated. If a 300 km x 100 km section of the mega thrust suddenly slipped 4-5 m (12-16 ft), that would yield a M~8.3 shock. That’s roughly equivalent to, or a bit larger than, adding the 1971 and 1985 shocks.

[link to temblor.net]
 Quoting: Spirit~Warrior


Wow this is freaky, not only did the article talk about a 8.3, it also did reference the 2014 quake which I did too. Either they are reading GLP or we came up with the exact same ideas at the same time...

-Finland
 Quoting: Anonymous Coward 74301666

:bump4:
Anonymous Coward
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Finland
04/28/2017 02:33 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
They definitely seem to know their stuff too! Even calculated the rupture lenghts.. wow. Scary.

-Finland
Anonymous Coward
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04/28/2017 02:33 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Magnitude 3.4
Region OFFSHORE VALPARAISO, CHILE
Date time 2017-04-28 18:20:09.0 UTC
Location 33.26 S ; 71.92 W
Depth 21 km
Macroseismic
Intensity F Effects: Felt


[link to m.emsc.eu]
Anonymous Coward
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04/28/2017 02:42 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Magnitude 4.2
Region OFFSHORE VALPARAISO, CHILE
Date time 2017-04-28 18:28:23.0 UTC
Location 33.28 S ; 71.96 W
Depth 23 km
Macroseismic
Intensity F Effects: Felt


[link to m.emsc.eu]
Simple27  (OP)

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04/28/2017 02:46 PM

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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
pop up

Magnitude 3.3
Region OFFSHORE VALPARAISO, CHILE
Date time 2017-04-28 17:55:03.0 UTC
Location 33.34 S ; 71.88 W
Depth 26 km
Macroseismic
Intensity F Effects: Felt
[link to m.emsc.eu]
~*Ride the Wave*~
Simple27  (OP)

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04/28/2017 02:46 PM

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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
pop up

Magnitude 3.4
Region OFFSHORE VALPARAISO, CHILE
Date time 2017-04-28 18:13:59.0 UTC
Location 33.35 S ; 71.91 W
Depth 20 km
[link to m.emsc.eu]
~*Ride the Wave*~
Anonymous Coward
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04/28/2017 02:48 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Magnitude 3.5
Region OFFSHORE VALPARAISO, CHILE
Date time 2017-04-28 18:34:15.0 UTC
Location 33.23 S ; 71.99 W
Depth 20 km

[link to m.emsc.eu]
Anonymous Coward
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04/28/2017 02:59 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Magnitude 2.1
Region ISLAND OF HAWAII, HAWAII
Date time 2017-04-28 18:54:11.7 UTC
Location 19.22 N ; 155.41 W
Depth 34 km

[link to m.emsc.eu]
Anonymous Coward
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04/28/2017 03:04 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Magnitude 4.7
Region OFFSHORE VALPARAISO, CHILE
Date time 2017-04-28 15:33:30.0 UTC
Location 33.32 S ; 71.96 W
Depth 24 km
Macroseismic
Intensity V Effects: Strong Shaking
[link to m.emsc.eu]
 Quoting: Simple27

UPGRADED: 5.1 at 20 km
Anonymous Coward
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04/28/2017 03:11 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
POP UP:

Magnitude 3.6
Region OFFSHORE O'HIGGINS, CHILE
Date time 2017-04-28 18:53:41.0 UTC
Location 33.95 S ; 72.26 W
Depth 18 km

[link to m.emsc.eu]
Anonymous Coward
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Finland
04/28/2017 03:25 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Seventeen (!!!) 4+ after the latest 5.9 in under 4 hours!!!
Normally even a low 7 does not produce that many in under 5 hours. Even the 6.9 had less "aftershocks" when it hit a few days ago.. would a mere 5.9 cause this activity? absolutely not.

-Finland
Anonymous Coward
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04/28/2017 03:25 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Magnitude 3.9
Region OFFSHORE VALPARAISO, CHILE
Date time 2017-04-28 19:11:40.0 UTC
Location 33.26 S ; 72.03 W
Depth 19 km

[link to m.emsc.eu]
Anonymous Coward
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04/28/2017 03:26 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Seventeen (!!!) 4+ after the latest 5.9 in under 4 hours!!!
Normally even a low 7 does not produce that many in under 5 hours. Even the 6.9 had less "aftershocks" when it hit a few days ago.. would a mere 5.9 cause this activity? absolutely not.

-Finland
 Quoting: Anonymous Coward 70577238

:sw_big-bump:
Anonymous Coward
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Finland
04/28/2017 03:28 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Seventeen (!!!) 4+ after the latest 5.9 in under 4 hours!!!
Normally even a low 7 does not produce that many in under 5 hours. Even the 6.9 had less "aftershocks" when it hit a few days ago.. would a mere 5.9 cause this activity? absolutely not.

-Finland
 Quoting: Anonymous Coward 70577238


Also, it would be the first time in my recollection that a 6.9 would produce aftershocks after three days of hiatus. Aftershocks don't operate that way. They lessen after time and usually occur right away, not with a three day lull period and then produce 17 4+.

-Finland
Anonymous Coward
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Finland
04/28/2017 03:29 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Oh one more thing, thank you SW for posting the excellent Tremblor link, some great further information and really nice analysis of the whole situation!

-Finland
Anonymous Coward
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04/28/2017 03:31 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Oh one more thing, thank you SW for posting the excellent Tremblor link, some great further information and really nice analysis of the whole situation!

-Finland
 Quoting: Anonymous Coward 70577238

hugs
Anonymous Coward
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04/28/2017 03:40 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Magnitude 3.2
Region OFFSHORE VALPARAISO, CHILE
Date time 2017-04-28 19:18:19.0 UTC
Location 33.35 S ; 71.98 W
Depth 24 km

[link to m.emsc.eu]
Mikromanic

User ID: 73296563
Chile
04/28/2017 03:44 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Seventeen (!!!) 4+ after the latest 5.9 in under 4 hours!!!
Normally even a low 7 does not produce that many in under 5 hours. Even the 6.9 had less "aftershocks" when it hit a few days ago.. would a mere 5.9 cause this activity? absolutely not.

-Finland
 Quoting: Anonymous Coward 70577238


Also, it would be the first time in my recollection that a 6.9 would produce aftershocks after three days of hiatus. Aftershocks don't operate that way. They lessen after time and usually occur right away, not with a three day lull period and then produce 17 4+.

-Finland
 Quoting: Anonymous Coward 70577238


We can only learn from this right?
Keep up the good work!

I am here, prepared as always.
Wubbo Ockels

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Netherlands
04/28/2017 03:53 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Seventeen (!!!) 4+ after the latest 5.9 in under 4 hours!!!
Normally even a low 7 does not produce that many in under 5 hours. Even the 6.9 had less "aftershocks" when it hit a few days ago.. would a mere 5.9 cause this activity? absolutely not.

-Finland
 Quoting: Anonymous Coward 70577238


Also, it would be the first time in my recollection that a 6.9 would produce aftershocks after three days of hiatus. Aftershocks don't operate that way. They lessen after time and usually occur right away, not with a three day lull period and then produce 17 4+.

-Finland
 Quoting: Anonymous Coward 70577238



what do you think?

preshocks of a mammothquake?


.
R.I.P. for the real Wubbo Ockels. He was a true icon of my country, and a great front-fighter for sustainable energie/technology and humanism.

"Yes, we have hurdles, we have distractions, we have disasters, personally and world-wide, and we do have to work it all out ourselves. BUT, there is a most amazing experience awaiting us on the other end of the finish-line.
The idea being, once we can handle it all down here, then we can live and explore eternally, responsibly, because we know what not to do, and not be resentful about being responsible, so we don't start a polarity domino effect in the other realms of existence."

"The Fraction" of Life can be increased in value not so much by increasing your Numerator as by lessening your Denominator. Nay, unless my Algebra deceive me, Unity itself divided by Zero will give Infinity."

Thread: LADIES & GENTLEMEN: I PRESENT to YOU OUR NEW SUN !!
Anonymous Coward
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Finland
04/28/2017 04:08 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Seventeen (!!!) 4+ after the latest 5.9 in under 4 hours!!!
Normally even a low 7 does not produce that many in under 5 hours. Even the 6.9 had less "aftershocks" when it hit a few days ago.. would a mere 5.9 cause this activity? absolutely not.

-Finland
 Quoting: Anonymous Coward 70577238


Also, it would be the first time in my recollection that a 6.9 would produce aftershocks after three days of hiatus. Aftershocks don't operate that way. They lessen after time and usually occur right away, not with a three day lull period and then produce 17 4+.

-Finland
 Quoting: Anonymous Coward 70577238



what do you think?

preshocks of a mammothquake?


.
 Quoting: Wubbo Ockels


My position has been always the same, that these all are foreshocks, from day 1 on 4/23 when the first 5.9 hit. Not a mammoth quake if you mean over 9, but historically these kinds of foreshock sequences have culminated in magnitudes 7.9-8.3. Anything over 7.6 definitely.

I'm sure Chileans will ride this out like they did in 2014 and 2015. Hopefully minimal amount of casualties, however the shallow profile and proximity to major cities is concerning.

As said in the article, in 1985 8.0 hit Valparaiso so it's capable :/

-Finland
Anonymous Coward
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04/28/2017 04:31 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Magnitude 7.2
Region MINDANAO, PHILIPPINES

Date time 2017-04-28 20:23:17.6 UTC
Location 5.51 N ; 125.13 E
Depth 40 km
Macroseismic
Intensity F Effects: Felt


[link to m.emsc.eu]

UPDATE: Macroseismic Intensity VI Effects: Slightly Damaging
DOWNGRADED: 6.8


siren2
Mikromanic

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Chile
04/28/2017 04:32 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Does the 7.2 in Philippines changes things for Chile?
Anonymous Coward
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04/28/2017 04:35 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
A Major Shallow-Focus Earthquake Hits MINDANAO, PHILIPPINES
This one is shallow and offshore...not so far from very populated islands, possible tsunami but hoping for no tsunami.

BASED ON THE PRELIMINARY EARTHQUAKE PARAMETERS... HAZARDOUS TSUNAMI WAVES ARE POSSIBLE FOR COASTS LOCATED WITHIN 300 KM OF THE EARTHQUAKE EPICENTER.
HAZARDOUS TSUNAMI WAVES FROM THIS EARTHQUAKE ARE POSSIBLE WITHIN 300 KM OF THE EPICENTER ALONG THE COASTS OF INDONESIA AND PHILIPPINES.

TSUNAMI WATCH...
[link to snc.pdc.org]

#TSUNAMI Alert-Update: Tsunami Warning (Pacific Ocean) - Mindanao Philippines - 6.9, Severity: WARNING
[link to twitter.com (secure)]

Update: Tsunami waves up to 3 ft expected along coasts of the Philippines after 6.9 quake [link to ptwc.weather.gov]
[link to twitter.com (secure)]

bump
Anonymous Coward
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04/28/2017 04:42 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Thread: BREAKING: 7.2 MAG EQ, PHILIPPINES

this is pinned
WhiteAngel
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04/28/2017 04:48 PM

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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Already downgraded to 6.8
Isaiah 5:20 KJV
Woe unto them that call evil good, and good evil; that put darkness for light, and light for darkness; that put bitter for sweet, and sweet for bitter!
Thread: Being Prepared - Updated Basic Food List On Page One
WhiteAngel
also known at WA

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04/28/2017 04:51 PM

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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Last weekend we were in the 80's and 70's. 3 hours ago we went under a Winter Storm Warming - 6-12" of snow expected. I will believe it when I see it, lol
Isaiah 5:20 KJV
Woe unto them that call evil good, and good evil; that put darkness for light, and light for darkness; that put bitter for sweet, and sweet for bitter!
Thread: Being Prepared - Updated Basic Food List On Page One
Isis One

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04/28/2017 04:51 PM

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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
What's the antipode of the Philippines?
Spread the word, change the collective conscious......
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Evolution16

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04/28/2017 04:52 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
What's the antipode of the Philippines?
 Quoting: Isis One


[link to www.antipodesmap.com (secure)]
Government is best which governs least - Jefferson
Anonymous Coward
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04/28/2017 04:52 PM
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Re: Earthquake Thread ~ Always Updated*5.1 Mariana Islands*5.0 Mariana Islands ~ Pg 20373
Very strong dangerous earthquake close to the Mindanao coast, Philippines

[link to earthquake-report.com]





GLP