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West Napa Fault : ウィキペディア英語版 | West Napa Fault
The West Napa Fault is a long geologic fault in Napa County, California, believed to be the northern extension of the Calaveras Fault. It has been mapped as a late Pleistocene-Holocene active fault and is considered to be predominantly a right lateral strike-slip fault. The fault was discovered in 1976 by Gene Boudreau, a ground water drilling specialist from Sebastopol. The West Napa Fault is a likely source for the magnitude 6.0 earthquake that hit Napa County on August 24, 2014. Seismologists were not able to determine the exact fault on which the quake occurred, because faults are usually identified by their expression on the surface. The epicenter for the 2000 Yountville earthquake which occurred on September 3, 2000 is also near the West Napa Fault. ==References==
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「West Napa Fault」の詳細全文を読む
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