Champaign, Ill. - Scientists say they know far too little about Midwestern seismic zones like the one that rumbled to life under southern Illinois Friday morning, but much of what they do know is striking.
The fault zones beneath the Mississippi River Valley have produced the largest modern U.S. quakes east of the Rockies, a region covered with old buildings not built to withstand seismic activity.
And, when quakes happen, they're felt far and wide, their vibrations propagated over hundreds of miles of bedrock.
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Comment: Climate change may indeed prove to be catastrophic but not necessarily because of global warming.