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1787 Mexico earthquake : ウィキペディア英語版 | 1787 Mexico earthquake
The 1787 Mexico earthquake, also known as the San Sixto earthquake, occurred on 28 March at 11:30 local time (17:30 UTC). It caused a large tsunami that affected the coast of the states of Guerrero and Oaxaca in Southwestern Mexico. With an estimated magnitude of 8.6 on the moment magnitude scale it was more powerful than any instrumentally recorded Mexican earthquake. ==Tectonic setting== Southwestern Mexico lies above the convergent boundary where the Cocos Plate is being subducted below the North American Plate at a rate of 6.4 cm/yr. The dip of the subducting slab is about 15° as defined by focal mechanisms and earthquake hypocenters. Seismicity in this area is characterised by regular megathrust earthquakes along the plate interface.
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「1787 Mexico earthquake」の詳細全文を読む
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