Geologists: Quake happened on unknown fault line

February 11, 2010 2:19:00 PM PST
While geologists know the epicenter of Wednesday's earthquake was near Pingree Grove which is in the New Madrid fault zone, they now say it most likely occurred on a previously unknown fault line.Geologists say there are a number of small fracture zones extending throughout the state.

The quake's magnitude was measured at 3.8. It hit about 4 a.m. Wednesday and was felt in Illinois, Indiana, Iowa and Wisconsin.