Dec 30 2010 Indiana Earthquake Rare Earthquake in Indiana Registers 3.8

A 3.8 magnitude Indiana earthquake, initially thought to be 4.2 by the way, has rattled much of Central Indiana Thursday morning, and was even felt by some residents from Chicago, several hundred miles away. The U.S. Geological Survey initially estimated the quake’s strength was magnitude 4.2, but has since then lowered that number down to 3.8 accordingly, according to the Associated Press.

Residents of Chicago, Naperville and Buffalo Grove, Illinois told NBC Chicago they felt their beds shaking and saw their ceiling fans move early Thursday. A geophysicist told the AP a 3.8 magnitude quake “would feel like a loaded truck passing by.”

The Indiana Geological Survey had no records of a 3.8 magnitude quake in Central Indiana ever, according to the Indianapolis Star. The director of the IGS told the Star that the quakes location–about 3 miles below the ground–was “highly irregular” and “extremely rare.” According to the U.S. Geological Survey, the quake struck just before 8 a.m. ET and was three miles deep. The USGS initially reported that the quake had registered a 4.2 magnitude, but later revised the estimate to the 3.8. Its epicenter was located about 15 miles east-southeast of Kokomo, and 50 miles north of Indianapolis.

Indiana’s last major earthquake was on April 18, 2008. The 5.2 magnitude earthquake was the strongest to hit the state in 40 years, the Star reports. This state is not typically associated with earthquakes, like California is, and there are no fault lines in the area, according to Michael Hamburger, a geologist at a state University. He explained to local TV station WTHR that the quake occurred in a area that is not common for earthquakes, and that it is very quiet seismically. It does however, have a few earthquakes, the most notable was a 5.1 magnitude quake on September 27, 1909 between the cities of Vincennes and Terre Haute, near the Illinois border. It also is near enough to the New Madrid fault to be affected by any large quakes on that fault line, such as the 1811 and 1812 series of quakes.

There were no reported injuries or damage from the 3.8 magnitude Indiana Earthquake that had been reported as of 9:30 a.m. CT.

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Map of the Dec 30 2010 Indiana Earthquake and Surrounding Areas from the USGS

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