>>>>>>5.5 EARTHQUAKE ... COLORADO<<<<<<<<

News report
Trinidad,

[link to www.examiner.com]

Colorado



Earthquake History

Colorado is considered a region of minor earthquake activity, although there are many uncertainties because of the very short time period for which historical data is available. The northwestern and southwestern corners, and the Sangre de Cristo Mountains in the south-central section of the State, have had no activity in historic times. Eastern Colorado is nearly aseismic, with just a few epicenters in the Arkansas and Platte River Valleys. Most shocks in the history of this State have centered west of the Rocky Mountain Front Range.

F.A. Hadsell, writing in the Colorado School of Mines Quarterly (vol. 63, No. 1, Jan. 1968), reports the first known reference to an earthquake in Colorado occurred on December 7, 1870. The Colorado Transcript states, ``A careful observer at Fort Reynolds, 20 miles east of Pueblo, noted that bottles standing 1 inch apart were knocked together violently.'' Hadsell also notes that, although the first seismograph in Colorado was installed by Father Armand W. Forstall at Regis College in 1909, seismographs of sufficient quality and quantity were not available to monitor Colorado earthquakes until about 1962. Thus, between 1870 and 1962, newspaper accounts are the prime source of published data on Colorado shocks.

The earthquake of November 7, 1882, the first ever to cause damage at Denver, probably centered in the Front Range near Rocky Mountain National Park, and is the largest historical earthquake in the state. The magnitude is estimated to be about 6.6 on the Richter scale. In Boulder County the walls of the depot cracked, and plaster fell from walls at the university at Boulder. The quake was felt as far away as Salina, Kansas and Salt Lake City, Utah. The Longmont Ledger of November 10, 1882, states:

``It is claimed by the oldest settlers in Denver that this is the first known instance of an earthquake having visited Colorado... that this is the first and only instance in the political history of Colorado when a fall election has ever been carried by the ... party. It was probably nature's protest ... uttered at the time of closing the polls Tuesday evening ... when the polls were closed, and it became evident that the ... party was finally to take control of our state government, she could no longer control her feelings, but uttered a groan of anguish which caused the very mountains to tremble. Curious but true.''

An earthquake on November 15, 1901, cracked windows and rolled boulders onto the highway in Buena Vista; the water of Cottonwood Lake was reportedly agitated. Another shock of similar intensity (VI) did not occur until September 8, 1944. During this tremor, bricks fell from chimneys and walls and chimneys cracked at Basalt, about 100 miles west of Denver. Eleven years later, in August 1955, a strong earthquake left cracks in chimneys and ground at Lake City, about 170 miles southwest of Denver. On October 11, 1960, a shock cracked a foundation and loosened cupboards from walls at Montrose. Windows, plaster, and chimneys were damaged in several towns in southwestern Colorado.

In 1961, a 12,000-foot well was drilled at the Rocky Mountain Arsenal, northeast of Denver, for disposing of waste fluids from Arsenal operations. Injection was commenced March 1962, and an unusual series of earthquakes erupted in the area shortly after.

It was 32 minutes after 4 a.m. on April 24 when the first shock of the Denver series was recorded at the Cecil H. Green Geophysical Observatory at Bergen Park, Colorado. Rated magnitude 1.5, it was not strong enough to be felt by area residents. By the end of December 1962, 190 earthquakes had occurred. Several were felt, but none caused damage until the window breaker that surprised Dupont and Irondale on the night of December 4. The shock shuffled furniture around in homes, and left electrical wall outlets hanging by their wires at Irondale.

Over 1,300 earthquakes were recorded at Bergen Park between January 1963 and August 9, 1967. Three shocks in 1965 -- February 16, September 29, and November 20 -- caused intensity VI damage in Commerce City and environs.

The Denver series was forgotten, however temporarily, in October 1966, when a southeast Colorado tremor rocked a 15,000 square-mile area of that State and bordering New Mexico. Minor damage, in the form of broken windows and dishes and cracked walls and plaster, occurred at Aguilar, Segundo, Trinchera, and Trinidad.

Another strong shock rumbled through the Denver area on November 14, 1966, causing some damage at Commerce City and Eastlake. Slighter rumblings (below magnitude 3.0) occurred throughout the remainder of 1966, and through the first week of April 1967.

Then, on April 10, the largest since the series began in 1962 occurred; 118 windowpanes were broken in buildings at the Rocky Mountain Arsenal, a crack in an asphalt parking lot was noted in the Derby area, and schools were dismissed in Boulder, where walls sustained cracks. Legislators quickly moved from beneath chandeliers in the Denver Capitol Building, fearing they might fall. The Colorado School of Mines rated this shock magnitude 5.0.

continued here :

[link to earthquake.usgs.gov]

1967 5.2

Gotta love it!

hmmm is this a fact? 5.5 is a small shake

[link to www.youtube.com]

Ok, threads over people. He knows for sure. It's time for bed.

Always

Here's another fact .. you're a Dumbass

[link to www.examiner.com]

Here is some Colorado earthquake history:

There are approximately 100 potentially active faults in Colorado and more than 400 temblors of magnitude 2.5 have occurred in the state since 1870. The Sangre de Cristo Fault in the mountain range of the same name and the Sawatch Fault along the Sawatch Range are considered to be the potentially most active.

The state’s largest quake occurred on November 7, 1882 along the northern Front Range and measured 6.5 on the Richter Scale.

According to the Colorado Division of Emergency Management, the costliest quake was a 5.3 magnitude temblor that occurred on August 9, 1967 and was centered near Commerce City. The quake caused more than $1 million worth of damage and is thought to have been caused by the injection of liquid waste into the earth at the Rocky Mountain Arsenal.

There was a 3.9 magnitude quake in Colorado in 2009.

Earthquake Details for the 3.9M quake:

Magnitude 3.9
Date-Time Monday, August 17, 2009 at 00:22:12 UTC
Sunday, August 16, 2009 at 06:22:12 PM at epicenter
Location 38.459°N, 102.620°W
Depth 10 km (6.2 miles) set by location program

More detailed Colorado earthquake history from USGS:

[link to earthquake.usgs.gov]

Any reported damages or deaths?

[link to neic.usgs.gov]

Whether they beg or not, I certainly hope they do!

+1.

Keep searchin for that first pin, Moran.

Middle of nowhere and not a huge quake. Still interesting though.

From Thread: ELENIN Aug 17-18 WARNING!!!
angles from picture Elenin Aug 17, 2011

Angle Earth - Sun - Mars is 107 degrees
Angle Earth - Sun - 0 line (near Uranus) is 36 degrees

23-AUG-2011 05:46:19 37.14 -104.67 5.5 4.9 COLORADO
22-AUG-2011 23:30:20 37.05 -104.77 4.6 5.0 COLORADO

No it isn't. A 5.3 OR 5.5 is considered a moderate quake.

Tunneling projects may have cause that? no?

Rockslides are being reported...

[link to abcnews.go.com]

That was a pretty mild quake....I've never felt a quake in Colorado before (until now)..

It looks like they've had quite a few EQs in the last 20 years in that area. Hard to tell exactly what magnitudes.

[link to neic.usgs.gov]

well, it has now been downgraded....to a 5.3

[link to earthquake.usgs.gov]

largest earthquake for Colorado since a 6.6 near Denver in 1882

This is MIRROR Earthquake because Elenin was 90 degrees to Earth. Power of Earthquake divide to SOUTH SANDWICH ISLANDS REGION

Again, angles from picture Elenin Aug 17, 2011

See at MIRROR SIDE angles
Angle Earth - C/2010 X1 - Sun is 53 degrees
Angle Mercury - C/2010 X1 - Sun is 27 degrees

23-AUG-2011 03:20:01 -56.17 -27.08 4.9 110.1 SOUTH SANDWICH ISLANDS REGION
21-AUG-2011 12:38:53 -56.39 -27.54 5.6 127.7 SOUTH SANDWICH ISLANDS REGION

can anyone say "ELENIN...INBOUND"?

Me thinks so guys

trippy. I guess the historical map is smaller quakes.

I like eqs as long as no one/anything is hurt or damaged. Better than a roller coaster. adrenalin rush.

Here is the closest live seismograph to the area that I could find.

[link to earthquake.usgs.gov]



This area has quite a history but it is very ancient. Hopefully it's volcanoes are extinct.

[link to skywalker.cochise.edu]

Sweet dreams…


Last Edited by emerald eye on 08/23/2011 03:04 AM