At least 65 residents in Clintonville, Wisconsin reported more mysterious noises on Tuesday night this week. Local officials continue to request answers from the USGS as to what is causing these noises which on one occasion was a confirmed earthquake....developing...
http://www.fox11online.com/dpp/news/local/north_counties/booms-continue-in-clintonville
http://thenewsunit.blogspot.com/2012/03/wisconsin-earthquake-reports-increasing.html
http://thenewsunit.blogspot.com/2012/03/wisconsin-earthquakes-beginning.html