IU Professor: Earthquake was rare for north central Indiana
The earthquake was recorded by the three seismometers at Indiana University’s School of Geology where it picked up the vibration from between 3 and 5 miles below ground. Professor Michael Hamburger immediately knew it was significant.
http://www.fox59.com/news/wxin-iu-professor-earthquake-was-ra-123010,0,2597439.story
That’s an interesting news report. Maybe this is something we should keep an eye on.