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4/21/2008

Magnitude-4.5 aftershock reported from Midwest earthquake

Map locates approximate epicenter, extent and seismic zone of origination of a magnitude-5.2 earthquake in the Midwest; FYI-NEW MADRID QUAKE OF 1811

Breaking Earth News

Illinois, USA
WEST SALEM, Ill. - A strong aftershock shook Southern Illinois on Monday, three days after a magnitude 5.2 quake rattled the region.

Geologists say the temblor just before 12:40 a.m. registered 4.5 magnitude at its epicenter about 5 miles northwest of Mount Carmel. The location is in the same area as Friday's early morning earthquake, which shook a wide area of the Midwest and caused minor damage.

The Monday morning aftershock was the 18th since Friday and the second strongest, according to the U.S. Geological Survey. The strongest was a 4.6 magnitude shaker about 5 1/2 hours after the original quake Friday morning



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