| 翻訳と辞書 |
| Tacoma Fault ： ウィキペディア英語版 |
Tacoma Fault
The Tacoma Fault, just north of the city of Tacoma, Washington, is an active east–west striking north dipping reverse fault with approximately 35 miles (56 km) of identified surface rupture. It is believed capable of generating earthquakes of at least magnitude 7, and there is evidence of such a quake approximately 1,000 years ago, possibly the same earthquake documented on the Seattle Fault 24 miles (38 km) to the north.〔; .〕
== Geology ==
The Tacoma Fault – actually a zone of connected faults – was first suspected from gravitational surveying in the 1960s, subsequently confirmed by seismic reflection and other geophysical data, and traced by detailed LIDAR mapping; trenching and other paleoseismological studies have documented late Holocene uplift.〔, p. 2.〕 It extends west to the small town of Allyn (near the tip of Hood Canal), terminating at the same north-striking geophysical anomaly (tentatively named the Tahuya Fault) that terminates the Seattle Fault to the north. To the east one strand is aligned with Commencement Bay and the Puyallup River, other strands (or related faults) cross the East Passage of south-central Puget Sound. How far east these faults extend is not known, but probably as far as the Kent Valley.
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「Tacoma Fault」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.
|
|