Unexplained crack in the ground

http://ireport.cnn.com/docs/DOC-501263


It looks like scenes from a movie, where the ground has lifted 5 feet into the air. Eileen Heider heard the boom and the next day they found the earth was split open and the ground raised into the air by 5 feet.

What could have cause this ground to push upward at this kind of force? Native American suggest this are sits on some old historic volcanoes, others say we are at the northern most tip of the New Madrid Fault but what ever is causing this is scaring the local residents. They are fearful that this could happen again, maybe under their house.

I took a look of pictures and shot plenty of video. I have been posting it all in one spot so people can find it all.
http://uppermichiganearthquake.blogspot.com/