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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 >

巨大遠地地震による長周期歪地震波形の解析 : 2004年Sumatra-Andaman地震 (Mw9.0) 及び2005年Nias地震 (Mw8.6)

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Title: 巨大遠地地震による長周期歪地震波形の解析 : 2004年Sumatra-Andaman地震 (Mw9.0) 及び2005年Nias地震 (Mw8.6)
Other Titles: Analysis of long-period strain seismograms from great far earthquakes : 2004 Sumatra-Andaman earthquake (Mw9.0) and 2005 Nias earthquake
Authors: 上垣, 拓郎1 Browse this author
池上, 裕2 Browse this author
中西, 一郎3 Browse this author
小久保, 一哉4 Browse this author
露木, 貴裕5 Browse this author
中村, 浩二6 Browse this author
原田, 智史7 Browse this author
Authors(alt): Kamigaki, Takuro1
Ikegami, Yutaka2
Nakanishi, Ichiro3
Kokubo, Kazuya4
Tsuyuki, Takahiro5
Nakamura, Koji6
Harada, Satoshi7
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: 379
End Page: 382
Abstract: The long-period strain seismograms from the Sumatra-Andaman earthquake of December 26, 2004 and the Nias earthquake of March 28, 2005 are analyzed by comparing the observed seismograms with synthetic seismograms calculated by normal mode theory. The multiple CMT source (Tsai et al., 2005) and Harvard CMT solution explain the seismograms recorded by both extensometers and volumetric strainmeters from the 2004 and 2005 earthquakes, respectively. The long-period strain seismograms observed in Japan are consistent with about 9 min source duration and 1200 km fault length proposed by Tsai et al. (2005) and Velasco et al. (2006).
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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