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Title: 3次元速度構造を考慮した襟裳岬周辺における地震の震源決定
Other Titles: A distribution of earthquakes around the Erimo cape, Hokkaido, Japan, determined by three-dimensional velocity structure
Authors: 椎名, 高裕1 Browse this author
高橋, 浩晃2 Browse this author
勝俣, 啓3 Browse this author
一柳, 昌義4 Browse this author
Authors(alt): SHIINA, Takahiro1
ICHIYANAGI, Masayoshi4
Issue Date: 19-Mar-2018
Publisher: 北海道大学大学院理学研究院
Journal Title: 北海道大学地球物理学研究報告
Journal Title(alt): Geophysical bulletin of Hokkaido University
Volume: 81
Start Page: 33
End Page: 43
Abstract:  In order to evaluate differences in an earthquake distribution in one- or three-dimensional velocity structures, we tried re-determinations of locations of earthquakes occurred around the Erimo cape, Hokkaido, Japan, in the three-dimensional heterogeneous model. Because of lowvelocity anomaly developed beneath the Hidaka mountain range, the relocated earthquakes mark that their focal depths tend to decrease. The maximum focal depth change is about 15 km. These changes of relocated earthquakes from those estimated in the one-dimensional model suggest that precise determinations of hypocenter considering realistic, three-dimensional velocity structure would improve our understandings for seismic activity and their focal mechanism around the Erimo cape.
Type: bulletin (article)
Appears in Collections:北海道大学地球物理学研究報告 = Geophysical bulletin of Hokkaido University > 第81号

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