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北海道大学地球物理学研究報告 = Geophysical bulletin of Hokkaido University >
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Title: 石狩平野北西部における微動アレー探査
Other Titles: Microtremor Array Survey in the Northwestern Part of the Ishikari Plain
Authors: 吉田, 邦一1 Browse this author
笹谷, 努2 Browse this author
前田, 宜浩3 Browse this author
高井, 伸雄4 Browse this author
三輪田, 吾郎5 Browse this author
大畑, 大志郎6 Browse this author
Prasad, Dhakal Yadab7 Browse this author
鏡味, 洋史8 Browse this author
Fat-Helbary, Raafat El-Shafei9 Browse this author
Authors(alt): YOSHIDA, Kunikazu1
SASATANI, Tsutomu2
MAEDA, Takahiro3
TAKAI, Nobuo4
OHATA, Daishiro6
Prasad, Dhakal Yadab7
KAGAMI, Hiroshi8
Fat-Helbary, Raafat El -Shafei9
Issue Date: 19-Mar-2010
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: 73
Start Page: 159
End Page: 173
Abstract: S-wave velocity structures were explored in the northwestern part of Ishikari plain from microtremor array measurements. We measured microtremors using seismometer arrays at 3 sites on 4 days during May - July 2005. Phase velocities in a frequency range of 0.22 - 4.32 Hz were estimated using SPAC(SPatial AutoCorrelation)analysis of the microtremor records. The S-wave velocity structures were obtained by the inversion from the phase velocities using a genetic algorithm technique. The inverted S-wave velocity structures obtained from the microtremor array surveys in the present and previous studies indicate that the S-wave velocities of a geologic layer clearly depend on the depth.
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73号

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