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|magnitude = 6.9 Mw 〔 |intensity = IX (''Violent'') 〔 |damage = $12.5 million USD 〔 |depth = 〔 |type = Dip-slip 〔 |location = 〔 |aftershocks = 5.6 Mw Oct 28 at 19:51 UTC 〔 5.5 Mw Oct 29 at 23:29 UTC 〔 |countries affected = Central Idaho United States |landslide = Yes |casualties= 2 killed, three injured 〔 }} The 1983 Borah Peak earthquake occurred on October 28 at in the Lost River Range at Borah Peak in central Idaho, United States. The shock measured 6.9 on the moment magnitude scale and had a maximum Mercalli intensity of IX (''Violent''). ==Earthquake== The event is the largest and most significant to strike in the state of Idaho. Two children were killed by falling masonry while walking to school in Challis, about 120 miles (200 km) northeast of Boise, the state's capital. Twelve and a half million dollars in damage took place in the Challis-Mackay region. As a result of extreme surface faulting, a maximum Mercalli intensity of IX (''Violent'') was decided upon, while vibrational damage was at a Mercalli intensity of VI (''Strong'') to VII (''Very Strong'').〔 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「1983 Borah Peak earthquake」の詳細全文を読む スポンサード リンク
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