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北海道大学地球物理学研究報告 = Geophysical bulletin of Hokkaido University >
第72号 >

巨大近地地震による長周期体積歪波形の解析 : 2006年及び2007年千島列島地震 (Mw8.3及び8.1) と津波

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Title: 巨大近地地震による長周期体積歪波形の解析 : 2006年及び2007年千島列島地震 (Mw8.3及び8.1) と津波
Other Titles: Analysis of long-period volumetric strain generated by great near earthquakes : 2006 and 2007 Kurile Islands earthquakes (Mw8.3 and 8.1) and tsunamis
Authors: 上垣, 拓郎1 Browse this author
中西, 一郎2 Browse this author
露木, 貴裕3 Browse this author
原田, 智史4 Browse this author
Authors(alt): Kamigaki, Takuro1
Nakanishi, Ichiro2
Tsuyuki, Takahiro3
Harada, Satoshi4
Issue Date: 15-Mar-2009
Publisher: 北海道大学大学院理学研究院自然史科学部門(地球物理学)
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: 72
Start Page: 373
End Page: 377
Abstract: The Kurile Islands earthquakes of November 15, 2006 and January 13, 2007 are studied by using the volumetric strainmeter array in Tokai-Kanto area, Japan. The first-motion of long-period P waves recorded by the array shows good correlation with the first-arrival of tsunami waves observed on the Pacific side of Japan. The amplitude ratio of the long-period P waves (T > 50 s) between the two earthquakes explains the difference in moment magnitudes. The inconsistency between moment magnitudes and JMA magnitudes of the two earthquakes may have been caused by the difference of phases and period ranges used in the determination of the two magnitudes.
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72号

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