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The earthquake was one of the most widely felt in U.S. history, largely affecting 23 states over an area of 580,000 sq mi (1,500,000 km 2). In studying its cause, scientists discovered the Cottage Grove Fault in the Southern Illinois Basin. Within the region, millions felt the rupture.
Area Epicenter Mag. MMI Depth (km) Deaths Injuries Total damage / notes Source April 18, 2008: 7 km (4.3 mi) NNE of Bellmont, Wabash County: 5.2 M w: VII 14.3 2 Limited / strike-slip (left lateral) [1] June 10, 1987: 2 km (1.2 mi) ESE of Claremont, Richland County
On July 15, 2024, at 0253hrs CST a 3.4 magnitude earthquake was recorded with an epicenter roughly 2 km North West of Somonauk, Il. It has a largely 400 to 600-foot vertical displacement, although parts can reach up to an 800-foot displacement, and is likely a configuration of several smaller faults, varying in both direction and displacement.
The 2008 Illinois earthquake was one of the largest earthquakes ever recorded in the Midwest state of Illinois. This moderate strike-slip shock measured 5.2 on the moment magnitude scale and had a maximum Mercalli intensity of VII (Very strong) .
Locations of quakes magnitude 2.5 or greater in the Wabash Valley (upper right) and New Madrid (lower left) Seismic Zones. The Wabash Valley seismic zone (also known as the Wabash Valley fault system or fault zone) is a tectonic region located in the Midwestern United States, centered on the valley of the lower Wabash River, along the state line between southeastern Illinois and southwestern ...
A pie chart comparing the seismic moment release of the three largest earthquakes for the hundred-year period from 1906 to 2005 with that for all earthquakes of magnitudes <6, 6 to 7, 7 to 8, and >8 for the same period. The 2011 Japan quake would be roughly similar to Sumatra. Earthquakes of magnitude 8.0 and greater from 1900 to 2018.
[20] [21] The storm was more damaging to the power grid and more severe in terms of wind gusts than Hurricane Ike, which hit the area in September 2008 with 60 mph (97 km/h) sustained winds and 80 mph (130 km/h) gusts after slightly re-intensifying over Indiana, making it both the largest power outage and the largest power outage not related to ...
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