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In 1811 and 1812, the New Madrid fault zone that zig zags through five states shook so violently that it shifted furniture in Washington, D.C., and rang church bells in Boston. The series of temblors changed the course of the Mississippi River near Memphis, and historical accounts claim the river even flowed backward briefly.
Geologists consider the New Madrid fault line a major seismic zone and predict that an earthquake roughly the magnitude of the Haiti earthquake (7.0 on the Richter scale) could occur in the area during the next 50 years.
A Magnitude 5.2 quake took place in the Wabash zone[1] on April 18, 2008 at 09:37 UTC (04:37 CST), about 41 miles NNW of Evansville, Indiana, near the community of West Salem, Illinois[2]. It was felt all across southern Illinois, southern Indiana, western and central Kentucky and eastern Missouri, waking people up in Chicago and St. Louis, 123 miles away.[3][4] This was followed by several aftershocks and a second, magnitude 4.6 quake at 15:14 UTC (10:14 CST).[5] There were no injuries or serious damage reported late Friday morning, April 18, 2008.[6] In Mt. Carmel, Illinois, 15 southeast of the epicenter, a woman was reported trapped in her home by a collapsed porch but was quickly freed and wasn't hurt, said Mickie Smith, a police dispatcher there.[6] The earthquake occurred coincidentally on the 102nd anniversary of the 1906 San Francisco earthquake. The largest quake to have taken place in this Zone was a 5.4 earthquake in 1968.
# 1979 & 1980 - New York State and the adjacent areas experienced 131 earthquakes of magnitude 1 to 5.
# 1980, 5 earthquakes recorded north of Philadelphia, Pennsylvania. # 1980, Kentucky shaken by a magnitude 5.1 earthquake.
# 1982 -- New Brunswick, Canada, had a magnitude 5.7 earthquake.
# 1982 -- Arkansas earthquake swarm starts. Eighty-eight earthquakes between June 24 and July 5, 1982. Four earthquakes with magnitudes of 4.0 to 4.5 during first 3 months of swarm. Total of about 40,000 earthquakes in the area (most very small or not felt) between 1982 and 1985.
# 1983 - Lake Charles, Louisiana, experienced a magnitude 3.8 earthquake.
# 1983 -- Indiana had a magnitude 5.9 earthquake.
# 1986 -- Painesville, Ohio, experienced a magnitude 4.9 earthquake and several aftershocks. The earthquake was felt in 11 states.
# 1987 -- Southeastern Illinois experienced a magnitude 5.2 earthquake. This area has had 7 earthquakes of magnitude 4.5 or greater since 1892.
Originally posted by Greenize
Actually, scientist think the New madrid fault is dying. Which for me is great news!
www.sciencedaily.com...
Earthquake in Illinois could portend an emerging threat
Wabash Valley Fault - 'New Kid on the Block' By Tony Fitzpatrick
April 24, 2008 -- To the surprise of many, the earthquake on April 18, 2008, about 120 miles east of St. Louis, originated in the Wabash Valley Fault and not the better-known and more-dreaded New Madrid Fault in Missouri's bootheel.
"I think everyone's interested in the Wabash Valley Fault because a lot of the attention has been on the New Madrid Fault, but the Wabash Valley Fault could be the more dangerous one, at least for St. Louis and Illinois," said Wiens, professor of earth and planetary sciences in Arts & Sciences. "The strongest earthquakes in the last few years have come from the Wabash Valley Fault, which needs more investigation."