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2007 Alum Rock earthquake
|magnitude = 5.6 Mw 〔
|damage = Minor 〔
|intensity = VI (''Strong'') 〔
|depth = 〔
|location = 〔
|type = Strike-slip 〔
|countries affected = South Bay
Northern California
United States
|casualties = None
}}
The 2007 Alum Rock earthquake occurred on in Alum Rock Park in San Jose, California. It measured 5.6 on the moment magnitude scale and had a maximum Mercalli intensity of VI (''Strong''). The event was then the largest in the San Francisco Bay Area since the 1989 Loma Prieta earthquake, which measured 6.9 on the moment magnitude scale, but was later surpassed by the 2014 South Napa earthquake. Ground shaking from the Alum Rock quake reached San Francisco and Oakland and other points further north. Sixty thousand felt reports existed far beyond Santa Rosa, as far north as Eugene, Oregon.
==Earthquake==
The shock originated on the Calaveras Fault and ruptured an area of the fault for a length of about beginning at the hypocenter and extending southeast. No surface trace of the earthquake along the fault. David Oppenheimer, a seismologist at the United States Geological Survey (USGS), said that although the quake was felt as a strong jolt over a wide region, it was more significant because it caused stress changes in the Calaveras Fault and the nearby Hayward Fault.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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