We've had 15 aftershocks since the first one. Latest one this morning.
It was only 4.5.


INDIANAPOLIS -- Another aftershock from Friday's earthquake shook parts of the Midwest early Monday morning and was felt by some in central Indiana.

The aftershock, which registered a 4.5 on the Richter scale, struck at 1:38 a.m., according to the U.S. Geological Survey.

The epicenter of the quake was about five miles northwest of Mount Carmel, Ill., near the epicenter of Friday's earthquake.

Most people in central Indiana slept through the latest rumbling. Fifteen aftershocks or more of varying intensity have been recorded since the initial quake early Friday morning.

"It's quite typical of an earthquake of this size … that a number of aftershocks can occur," said Amy Vaughan of the USGS.

Vaughan said that as many as 10 aftershocks could be expected in the "4" range of magnitude, with up to 100 in the "3" range.

"Generally speaking, the chances are rather low that this event would be followed by a larger event," Vaughan said. "That's not to say it's unheard of, but … the pattern is that the '4' shock is the main shock and will be the largest."