翻訳と辞書 |
1989 Ungava earthquake : ウィキペディア英語版 | 1989 Ungava earthquake
The 1989 Ungava earthquake occurred at 09:24 local time (14:24 UTC) on December 25 to the north of Lac Bécard in a remote part of the Ungava Peninsula in northern Quebec.〔 It had a magnitude of 6.3 on the surface wave magnitude scale and 6.2–6.5 on the moment magnitude scale and a maximum felt intensity of only IV (''Light'') on the Mercalli intensity scale, due to its remoteness from any inhabited areas. The mainshock was preceded by a magnitude 5.1 foreshock ten hours earlier. It was the first earthquake in eastern North America known to be associated with ground rupture.〔 ==Tectonic setting== The northern part of Quebec lies mainly on the Minto block of the Superior craton. The earthquake occurred within the Utsalik domain, which consists mainly of Archean granitic and granodioritic rocks. A number of northerly trending brittle faults zones have been recognized in the domain. The area has been tectonically quiescent since the Archean. However, like most of the Canadian shield, it is currently experiencing post-glacial rebound.〔
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「1989 Ungava earthquake」の詳細全文を読む
スポンサード リンク
翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|