論文

査読有り 国際誌
2011年3月

Anomalous depth dependency of the stress field in the 2007 Noto Hanto, Japan, earthquake: Potential involvement of a deep fluid reservoir

GEOPHYSICAL RESEARCH LETTERS
  • Aitaro Kato
  • Shinichi Sakai
  • Takashi Iidaka
  • Takaya Iwasaki
  • Eiji Kurashimo
  • Toshihiro Igarashi
  • Naoshi Hirata
  • Toshihiko Kanazawa
  • Kei Katsumata
  • Hiroaki Takahashi
  • Ryo Honda
  • Takahiro Maeda
  • Masayoshi Ichiyanagi
  • Teruhiro Yamaguchi
  • Masahiro Kosuga
  • Tomomi Okada
  • Junichi Nakajima
  • Shuichiro Hori
  • Takashi Nakayama
  • Akira Hasegawa
  • Toshio Kono
  • Syuichi Suzuki
  • Noriko Tsumura
  • Yoshihiro Hiramatsu
  • Katsunori Sugaya
  • Aiko Hayashi
  • Tetsuya Hirose
  • Akihiro Sawada
  • Keisuke Tanaka
  • Yoshiko Yamanaka
  • Haruhisa Nakamichi
  • Takashi Okuda
  • Yoshihisa Iio
  • Kin'ya Nishigami
  • Masatoshi Miyazawa
  • Hiroo Wada
  • Norio Hirano
  • Hiroshi Katao
  • Shiro Ohmi
  • Kiyoshi Ito
  • Issei Doi
  • Shunta Noda
  • Satoshi Matsumoto
  • Takeshi Matsushima
  • Atsushi Saiga
  • Hiroki Miyamachi
  • Kazutoshi Imanishi
  • Tetsuya Takeda
  • Youichi Asano
  • Yohei Yukutake
  • Tomotake Ueno
  • Takuto Maeda
  • Takanori Matsuzawa
  • Shutaro Sekine
  • Makoto Matsubara
  • Kazushige Obara
  • 全て表示

38
6
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1029/2010GL046413
出版者・発行元
AMER GEOPHYSICAL UNION

We have elucidated depth variations in the stress field associated with the 2007 Noto Hanto, Japan, earthquake by stress tensor inversion using high-quality aftershock data obtained by a dense seismic network. Aftershocks that occurred above 4 km in depth indicated a strike-slip stress regime. By contrast, aftershocks in deeper parts indicated a thrust faulting stress regime. This depth variation in the stress regime correlates well with that in the slip direction derived from a finite source model using geodetic data. Furthermore, the maximum principal stress (sigma(1)) axis was stably oriented approximately W20 degrees N down to the depth of the mainshock hypocenter, largely in agreement with the regional stress field, but, below that depth, the s1 axis had no definite orientation, indicating horizontally isotropic stress. One likely cause of these drastic changes in the stress regime with depth is the buoyant force of a fluid reservoir localized beneath the seismogenic zone. Citation: Kato, A., et al. (2011), Anomalous depth dependency of the stress field in the 2007 Noto Hanto, Japan, earthquake: Potential involvement of a deep fluid reservoir, Geophys. Res. Lett., 38, L06306, doi:10.1029/2010GL046413.

リンク情報
DOI
https://doi.org/10.1029/2010GL046413
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000288864700001&DestApp=WOS_CPL
ID情報
  • DOI : 10.1029/2010GL046413
  • ISSN : 0094-8276
  • eISSN : 1944-8007
  • Web of Science ID : WOS:000288864700001

エクスポート
BibTeX RIS