Unified Interior Regions


The USGS Central Midwest Water Science Center collects, analyzes and disseminates the impartial hydrologic data and information needed to wisely and effectively manage water resources in Illinois. Our scientific research affects current issues ranging from flood and drought hazards to the impact and control of invasive species.

Link to Science Center

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September 2, 1999

News Release Address: USGS A minor earthquake, preliminary magnitude 3.5 according to the U.S. Geological Survey, occurred in northern Illinois at 12:17 Eastern Daylight Time, or 11:17 local time today, Sept. 2. 

April 1, 1996

About 10 strong earthquakes have struck southern Illinois and Indiana during the past 12,000 years, according to a new study by geologist Steve Obermeier of the U.S. Geological Survey and archeologists Pat Munson and Rex Garniewicz of Indiana University.