WEST SALEM, IL - The U.S. Geological Survey says this morning's 5.2-magnitude earthquake was likely generated by the Wabash fault zone in southeastern Illinois and southwestern Indiana.
USGS geophysicist Carrieann Bedwell says the quake about six miles from West Salem, Illinois, occured in a northward extension of the New Madrid fault area.
The fault is the country's most active seismic zone east of the Rockies and produces numerous small quakes a year, but most are too weak to be noticed by the public.
In 1811 and 1812, the fault produced a series of earthquakes estimated at magnitude 7.0 or greater.
The Wabash fault zone generated a magnitude 5.0 quake in 2002 and a 5.1 in 1987.
This morning's sizable temblor was felt from Georgia to Michigan, but no major damage has been reported.
The quake, which occured around 4:30 a.m. and lasted approximately 45 seconds, was also felt in southeast Missouri and northeast Arkansas.
Let us know if you felt it. Please describe what it was like this morning: email@example.com. Include your first name and your town of residency.
(The Associated Press contributed to this report.)
Tremor Descriptions from Region 8 Viewers:
I live in Jonesboro and felt the earthquake early this morning sometime after midnight. It felt like someone was shaking my bed and I could see the tea in my glass moving with the vibrations. It was awesome - Rachel and Zoey
I was woke up by it and I felt it for a steady minute. It really shook our house. - Mike of Malden, MO
I was awake and watching TV this morning when the earthquake happened. I heard a 'popping' sound in my house and everything seemed to vibrate for about 20 seconds. I noticed my ceiling fan pull-chain swaying back and forth and without the fan on, I knew right away it had to be a tremor. - Carol
Several of my coworkers and I woke up this morning because of the earthquake. I sat straight up in the bed - the bed was shaking as if someone had a hold of it and my china cabinet shook and rattled. The amount of time it lasted seemed longer than it was! - Kim of Campbell, MO.