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  2. New Madrid Seismic Zone - Wikipedia

    en.wikipedia.org/wiki/New_Madrid_Seismic_Zone

    The New Madrid Seismic Zone (NMSZ), sometimes called the New Madrid Fault Line, is a major seismic zone and a prolific source of intraplate earthquakes (earthquakes within a tectonic plate) in the Southern and Midwestern United States, stretching to the southwest from New Madrid, Missouri. The New Madrid fault system was responsible for the ...

  3. 1968 Illinois earthquake - Wikipedia

    en.wikipedia.org/wiki/1968_Illinois_earthquake

    The 1968 Illinois earthquake (a New Madrid event) [ 4 ] was the largest recorded earthquake in the U.S. Midwestern state of Illinois. Striking at 11:02 a.m. on November 9, it measured 5.3 on the Richter scale. [ 5 ] Although no fatalities occurred, the event caused considerable structural damage to buildings, including the toppling of chimneys ...

  4. Wabash Valley Seismic Zone - Wikipedia

    en.wikipedia.org/wiki/Wabash_Valley_Seismic_Zone

    Locations of quakes magnitude 2.5 or greater in the Wabash Valley (upper right) and New Madrid (lower left) Seismic Zones. The Wabash Valley Seismic Zone (also known as the Wabash Valley Fault System or Zone) is a tectonic region located in the Midwestern United States, centered on the valley of the Lower Wabash River, along the state line between southeastern Illinois and southwestern Indiana.

  5. Earthquake recorded in southern Illinois. If you felt it, the ...

    www.aol.com/news/earthquake-recorded-southern...

    If you felt it, the USGS wants you to report it. A 2.4-magnitude earthquake was recorded Wednesday night about five miles northwest of Keyesport, the United States Geological Survey said. The ...

  6. 1811–1812 New Madrid earthquakes - Wikipedia

    en.wikipedia.org/wiki/1811–1812_New_Madrid...

    The 1811–1812 New Madrid earthquakes were a series of intense intraplate earthquakes beginning with an initial earthquake of moment magnitude 7.2–8.2 on December 16, 1811, followed by a moment magnitude 7.4 aftershock on the same day. Two additional earthquakes of similar magnitude followed in January and February 1812.

  7. Southern Illinois - Wikipedia

    en.wikipedia.org/wiki/Southern_Illinois

    Southern Illinois is a region of the U.S. state of Illinois comprising the southern third of the state, principally south of Interstate 70.Part of downstate Illinois, it is bordered by the two most voluminous rivers in the United States: the Mississippi below its connection with the Missouri River to the west and the Ohio River to the east and south, with the tributary Wabash River, extending ...

  8. Great Lakes tectonic zone - Wikipedia

    en.wikipedia.org/wiki/Great_Lakes_Tectonic_Zone

    The Great Lakes tectonic zone (GLTZ) is bounded by South Dakota at its tip and heads northeast to south of Duluth, Minnesota, then heads east through northern Wisconsin, Marquette, Michigan, and then trends more northeasterly to skim the northernmost shores of lakes. Algoman orogeny added landmass to the Superior province by volcanic activity ...

  9. Which parts of Stanislaus County are most at risk for ... - AOL

    www.aol.com/news/parts-stanislaus-county-most...

    In the southern area of the Diablo Range, an area west of I-5, is the Ortigalita fault. Most construction in this area is prohibited without a geographic study, according to the county. A map of ...