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|magnitude = 7.8 Mw〔 |depth =〔(Location of the Focal Region and Hypocenter of the California Earthquake of April 18, 1906 )〕 |intensity = XI (''Extreme'')〔 |countries affected = North Coast San Francisco Bay Area Central Coast United States |location = 〔 |type = Strike-slip〔 |tsunami = Yes〔 |casualties = 3,000+ }} The 1906 San Francisco earthquake struck the coast of Northern California at 5:12 a.m. on April 18 with a moment magnitude of 7.8 and a maximum Mercalli intensity of XI (''Extreme''). Devastating fires broke out in the city that lasted for several days. As a result, about 3,000 people died and over 80% of San Francisco was destroyed. The earthquake and resulting fire are remembered as one of the worst natural disasters in the history of the United States. The death toll from the earthquake and resulting fire remains the greatest loss of life from a natural disaster in California's history. ==Tectonic setting== The San Andreas Fault is a continental transform fault that forms part of the tectonic boundary between the Pacific Plate and the North American Plate. The fault is characterized by mainly lateral motion in a dextral sense, where the western (Pacific) plate moves northward relative to the eastern (North American) plate. The 1906 rupture propagated both northward and southward for a total of .〔(1906 Earthquake: How long was the 1906 Crack? ) USGS Earthquake Hazards Program – Northern California, Accessed September 3, 2006〕 This fault runs the length of California from the Salton Sea in the south to Cape Mendocino in the north, a distance of about . The maximum observed surface displacement was about 20 feet (6 m); geodetic measurements show displacements of up to 28 feet (8.5 m).〔(1906 San Francisco Quake: How large was the offset? ) USGS Earthquake Hazards Program — Northern California. Accessed September 3, 2006〕 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「1906 San Francisco earthquake」の詳細全文を読む スポンサード リンク
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