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Magnitude-5.3 earthquake rattles southern Colorado

Date:
August 24, 2011
Source:
U.S. Geological Survey
Summary:
A magnitude-5.3 earthquake rattled southern Colorado Monday, August 22, at 11:46 p.m. MDT, causing strong shaking, but minor damage, and was felt throughout the state of Colorado and neighboring states. The USGS Prompt Assessment of Global Earthquakes for Response (PAGER) system issued a Green Alert, indicating a low probability for fatalities or significant economic losses.

A magnitude-5.3 earthquake rattled southern Colorado Monday, August 22, at 11:46 p.m. MDT, causing strong shaking, but minor damage, and was felt throughout the state of Colorado and neighboring states. The USGS Prompt Assessment of Global Earthquakes for Response (PAGER) system issued a Green Alert, indicating a low probability for fatalities or significant economic losses.

The earthquake occurred approximately nine miles southwest of Trinidad, Colo.

This was the largest earthquake in Colorado since a M5.3 in August, 1967 at Rocky Mountain Arsenal. The largest earthquake in Colorado history was Nov 7th, 1882, near Rocky Mountain National Park; estimates vary but it was about a Magnitude 6.5.

Yesterday's M5.3 had three detected foreshocks (M4.6, 3.0 and 2.9), and there have been many recorded aftershocks.

Citizens who felt the earthquake can go online and report their observations on the USGS Did You Feel It? Web site (http://earthquake.usgs.gov/eqcenter/dyfi/). Over 1,000 reports of felt shaking have already been received from more than 200 zip codes in six states.

Earthquakes cannot be predicted. This area in Colorado has a history of earthquakes, notably a swarm that occurred in 2001, with earthquake magnitudes between M2.9 and 4.6. A USGS report on those earthquakes is available at the USGS Earthquake Hazards Program website (http://pubs.usgs.gov/of/2002/ofr-02-0073/ofr-02-0073.html).


Story Source:

The above story is based on materials provided by U.S. Geological Survey. Note: Materials may be edited for content and length.


Cite This Page:

U.S. Geological Survey. "Magnitude-5.3 earthquake rattles southern Colorado." ScienceDaily. ScienceDaily, 24 August 2011. <www.sciencedaily.com/releases/2011/08/110824101632.htm>.
U.S. Geological Survey. (2011, August 24). Magnitude-5.3 earthquake rattles southern Colorado. ScienceDaily. Retrieved July 26, 2014 from www.sciencedaily.com/releases/2011/08/110824101632.htm
U.S. Geological Survey. "Magnitude-5.3 earthquake rattles southern Colorado." ScienceDaily. www.sciencedaily.com/releases/2011/08/110824101632.htm (accessed July 26, 2014).

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