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|magnitude = 6.8–7.0 ML |depth = |intensity = IX (''Violent'') 〔 |location = 〔 |countries affected = United States, California |tsunami = |casualties = 30 〔 }} The 1868 Hayward earthquake occurred in the San Francisco Bay Area, California, United States on October 21. With an estimated Richter magnitude of 6.8–7.0 and a maximum Mercalli intensity of IX (''Violent''), it was the most recent large earthquake to occur on the Hayward Fault Zone. It caused significant damage and a number of deaths throughout the region, and was known as the "Great San Francisco earthquake" prior to the 1906 San Francisco earthquake and fire. ==Earthquake== The earthquake occurred at 7:53 a.m. on October 21, 1868. Its epicenter was likely located near Hayward, California, and its magnitude has been estimated to have been 6.8–7.0 on the Richter scale. At the surface, ground rupture was traced for , from San Leandro to what is now the Warm Springs District in Fremont. 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「1868 Hayward earthquake」の詳細全文を読む スポンサード リンク
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