論文

査読有り
2009年10月

Triggered and Primary Surface Ruptures along the Camp Rock Fault, Eastern California Shear Zone

BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
  • Heitaro Kaneda
  • ,
  • Thomas K. Rockwell

99
5
開始ページ
2704
終了ページ
2720
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1785/0120080310
出版者・発行元
SEISMOLOGICAL SOC AMER

During the 1992 M-w 7.3 Landers earthquake in the eastern California shear zone, only the shallowest part of the central 8 km of the Camp Rock fault apparently ruptured, triggered by coseismic static stress changes. Our detailed tectonic-geomorphic analysis of a 2 km long stretch of the central Camp Rock fault reveals that the 1992 triggered surface rupture differs markedly from earlier primary surface ruptures in terms of its vertical-slip function. We interpret this to be related to a difference in stress directions that induced fault slips: the 1992 static stress changes decreased normal stress on the central Camp Rock fault, thereby inducing a normal component of slip, whereas a minor reverse-slip component is associated with more typical primary seismogenic surface ruptures due to regional north-south compression. Our findings suggest that a detailed geomorphic analysis of a key locality may allow for isolation of triggered surface ruptures from repeated primary surface ruptures identified in paleoseismic studies.

リンク情報
DOI
https://doi.org/10.1785/0120080310
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000270857800005&DestApp=WOS_CPL
ID情報
  • DOI : 10.1785/0120080310
  • ISSN : 0037-1106
  • eISSN : 1943-3573
  • Web of Science ID : WOS:000270857800005

エクスポート
BibTeX RIS