文章基本信息

标题：Shear wave polarization anisotropy in and around the focal region of the 2005 West off Fukuoka Prefecture earthquake
其他标题：Shear wave polarization anisotropy in and around the focal region of the 2005 West off Fukuoka Prefecture earthquake
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作者：Atsushi Watanabe ; Satoshi Matsumoto ; Takeshi Matsushima 等
期刊名称：Earth, Planets and Space
电子版ISSN：1880-5981
出版年度：2007
卷号：58
期号：12
页码：1633-1636
DOI：10.1186/BF03352674
出版社：Springer Verlag
摘要：Crustal shear wave polarization anisotropy is caused by the alignment of vertical microcracks. Leading shear wave polarization directions (LSPDs) are presumed to be consistent with the maximum horizontal compressional axis in many cases. We analyzed shear wave polarization anisotropy in and around the focal region of the 2005 West off Fukuoka Prefecture earthquake. Almost all of the LSPDs are oriented in the E-W direction, which is consistent with the maximum horizontal compressional axis inferred from the mechanism of the main shock. These E-to W-oriented LSPDs are caused by the alignment of stress-induced microcracks. Crack densities at most stations are estimated to be 0.02. Little spacial stress variation around focal region is suspected
关键词：Shear wave polarization anisotropy, 2005 West off Fukuoka earthquake