Reconsidering earthquake scaling

DOI Web Site Web Site 被引用文献15件 オープンアクセス
  • J. Gomberg
    U.S. Geological Survey University of Washington Seattle Washington USA
  • A. Wech
    U.S. Geological Survey Anchorage Alaska USA
  • K. Creager
    Department of Earth and Space Sciences University of Washington Seattle Washington USA
  • K. Obara
    Earthquake Research Institute University of Tokyo Tokyo Japan
  • D. Agnew
    IGPP University of California, San Diego La Jolla California USA

書誌事項

公開日
2016-06-28
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/2016gl069967
公開者
American Geophysical Union (AGU)

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説明

<jats:title>Abstract</jats:title><jats:p>The relationship (scaling) between scalar moment, <jats:italic>M</jats:italic><jats:sub>0</jats:sub>, and duration, <jats:italic>T</jats:italic>, potentially provides key constraints on the physics governing fault slip. The prevailing interpretation of <jats:italic>M</jats:italic><jats:sub>0</jats:sub>‐<jats:italic>T</jats:italic> observations proposes different scaling for fast (earthquakes) and slow (mostly aseismic) slip populations and thus fundamentally different driving mechanisms. We show that a single model of slip events within bounded slip zones may explain nearly all fast and slow slip <jats:italic>M</jats:italic><jats:sub>0</jats:sub>‐<jats:italic>T</jats:italic> observations, and both slip populations have a change in scaling, where the slip area growth changes from 2‐D when too small to sense the boundaries to 1‐D when large enough to be bounded. We present new fast and slow slip <jats:italic>M</jats:italic><jats:sub>0</jats:sub>‐<jats:italic>T</jats:italic> observations that sample the change in scaling in each population, which are consistent with our interpretation. We suggest that a continuous but bimodal distribution of slip modes exists and <jats:italic>M</jats:italic><jats:sub>0</jats:sub>‐<jats:italic>T</jats:italic> observations alone may not imply a fundamental difference between fast and slow slip.</jats:p>

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