Ill. earthquake a wake-up call

Apr 20, 2008

A U.S. seismologist said the earthquake that jolted the Midwest Friday is a reminder of the risks seismic events pose outside familiar quake areas.

U.S. Geological Survey seismologist Harley Benz earthquakes east of the Mississippi River are actually felt more widely than those in the West.

"Earthquakes of comparable size are felt over greater distances in the East than those occurring in the West," Benz said in a statement. "Earthquakes in the central (United States) are infrequent, but not unexpected."

The magnitude 5.2 earthquake -- centered 38 miles northwest of Evansville, Ind., in the Wabash Valley Seismic Zone -- is the strongest earthquake in southern Illinois since November 1968, when a 5.4 earthquake occurred.

While the earthquake and subsequent magnitude 4.6 aftershock were classified as moderate, the USGS said it is more concerned about the potential for the adjacent New Madrid seismic zone to generate severe earthquakes. A series of three very large earthquakes devastated the area between 1811 and 1812.

Copyright 2008 by United Press International

Explore further: Ancient deformation of the lithosphere revealed in Eastern China

add to favorites email to friend print save as pdf

Related Stories

Recommended for you

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.