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1897 Mindanao earthquakes : ウィキペディア英語版 | 1897 Mindanao earthquakes
The 1897 Mindanao earthquakes occurred on 20 September at 19:06 UTC and 21 September at 05:12 UTC. The estimated epicentres of the two earthquakes are identical, lying just off the southwestern coast of Mindanao in the Philippines, south of Basilan island. The earthquakes were originally given estimated magnitudes of 8.6 and 8.7 on the surface wave magnitude scale by Charles Richter, but these were revised downwards by Katsuyuki Abe to 7.4 and 7.5 Ms, respectively. Both earthquakes triggered tsunamis, with the second being quite destructive, with a maximum run-up of 7.0 m. At least 13 died as a result of the second tsunami, with a hundred or more casualties also being reported.〔 ==References==
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「1897 Mindanao earthquakes」の詳細全文を読む
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