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Strong Aftershock Felt

Strong Aftershock Felt
By: John Dissauer

CAPE GIRARDEAU, Mo. -- Several aftershocks have shaken the ground under the Heartland Friday morning.  The strongest aftershock occured around 10:14 a.m.

The USGS preliminary measurements of the aftershock was a 4.5 magnitude earthquake.  It was later upgraded to a 4.6 magnitude.  It was centered 8 miles east of West Salem, Illinois.

Here is a look at the Portageville, Missouri seismograph report.  The report shows activity through 10:30 a.m.

Here is a closer look at the aftershock.

Here's a look at a shake map of the 4.6 quake.