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|magnitude = 6.9 ML 〔 |intensity = VIII (''Severe'') 〔 |depth = |location = |type = Unknown |countries affected = Southern California United States |tsunami = |casualties = 40 〔 }} The 1812 Wrightwood earthquake, also known as the San Juan Capistrano earthquake, occurred on December 8 in Southern California 7:00 AM (Pacific time). It is thought to be the result of a rupture of the southern segment of the San Andreas Fault for an estimated length of near Wrightwood, California, though the epicenter's location is not precisely known, and other proposed sources for the event exist. The earthquake had a magnitude of 6.9 and a maximum perceived intensity of VIII (''Severe'') on the Mercalli intensity scale. ==Earthquake== Analysis of the what limited information is available about the earthquake was performed in the 1980s by seismologists Toussan Toppozada, Jack F. Evernden, and others. It is known that damage occurred in San Gabriel, and this group came up with a proposed epicenter along the south half of the Newport–Inglewood Fault zone, the source of the 1933 Long Beach earthquake. It was determined that the lack of damage at San Buenaventura, in what is now known as Ventura, limited the possible source of the event to that right-lateral fault. 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「1812 Wrightwood earthquake」の詳細全文を読む スポンサード リンク
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