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The 2008 Illinois earthquake was one of the largest earthquakes ever recorded in the state of Illinois, measuring a magnitude of 5.4. It occurred at 4:37:00am CDT (9:37:00 UTC) on April 18 within the Wabash Valley Seismic Zone at a depth of 11.6 km. It was centered near West Salem, Illinois and Mount Carmel, Illinois (the affected area is west of Terre Haute, Indiana and Vincennes, Indiana; east of St. Louis, Missouri; and northwest of Evansville, Indiana), specifically 38.450°N, 87.890°W,〔 〕 and felt as far as away. Tremors were felt as far west as Nebraska and Kansas City, as far south as Atlanta, as far east as Kitchener, Ontario and West Virginia, and as far north as the Upper Peninsula of Michigan. The earthquake was felt so far away, compared to earthquakes in other regions, because the old, rigid bedrock beneath much of the Midwest allows the tremor to propagate further.〔〔 The earthquake epicenter was located in the Wabash Valley Seismic Zone, which is adjacent to the more famous New Madrid Seismic Zone.〔 Television reports〕 ==Damage== * In Mount Carmel, Illinois, a woman was trapped in her home by a collapsed porch but was quickly freed and was not hurt. Also, an old school that was converted into a two-story apartment building was evacuated because of loose and falling bricks and because the roof had started to collapse into a couple of the apartments on the top floor. The building was later condemned. A man received serious eye injuries, but did not seek immediate medical attention.〔 * In St. Louis, Missouri, the outer lanes on the South Kingshighway Boulevard viaduct were closed between Shaw Boulevard and South Vandeventer Avenue/Southwest Avenue for approximately thirty minutes because pieces of concrete were seen around it, and on the surface streets/railroad tracks below it.〔 〕 Several chimneys collapsed in South St Louis, and the St Francis De Salles Oratory Roman Catholic Parish reported damage to its steeple, and the Basilica of St Louis King of France reported small fragments from the mosaic ceiling. Following the quake, 35,000 people in St Louis County were with out power, as the Labadie Power Station went offline due to strong vibrations. Power was restored by 9:46 AM * In Louisville, Kentucky, a facade broke off from an older building just south of downtown.〔WAVE (TV) 3 News, Louisville, Kentucky, April 18, 2008〕 * In Harrison County, Indiana, across the Ohio River from Louisville, the riverboat casino Caesars Indiana lost power.〔 * In Princeton, Indiana, a woman was cut when a crystal figurine was knocked from a shelf in her home. * Illinois and Kentucky state highway crews were investigating if any roads or bridges were damaged in the area nearest the quake, only cracks had been reported on U.S. Route 51 near Cairo, Illinois, at the state's southern tip, said Mike Claffey, a spokesman for the Illinois Department of Transportation. No roads were reported to be damaged in Kentucky, but inspections were being conducted in the Louisville, Paducah, and Henderson districts, according to the Kentucky Department of Transportation. * Unit 4 at Gibson Generating Station automatically shut down after the earthquake due to its vibration sensors.〔http://www.tristate-media.com/articles/2008/04/21/pdclarion/news/news1.txt 〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「2008 Illinois earthquake」の詳細全文を読む スポンサード リンク
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