A second earthquake, likely an aftershock, occured at 11:14 AM, and preliminary data from the US Geological Survey indicates the magnitude to be 4.5. This center of this quake occured 5 miles ENE of West Salem, IL. Many people have reported feeling this second quake. There have been no reports of damage.
Earlier today, at 5:37 AM, an earthquake was experience throughout central Indiana.
According the the US Geological Survey the magnitude was 5.2. The magnitude may be revised when additional data becomes available.
It was centered 20 miles southeast of Olney Illinois which is about 40 miles northwest of Evansville or about 125 miles southwest of Indianapolis.
This region borders the much more seismically active New Madrid seismic zone to the seismic zone’s north and west. Moderate damaging earthquakes strike somewhere in the region every decade or two.
Much more information can be found at: http://earthquake.usgs.gov/eqcenter/recenteqsww/Quakes/us2008qza6.html
Did you feel it? Please click here to report the earthquake.
(Image courtesy of USGS)