Migrations and Clusters of Shallow Very Low Frequency Earthquakes in the Regions Surrounding Shear Stress Accumulation Peaks Along the Nankai Trough

DOI Web Site Web Site Web Site 被引用文献21件 参考文献71件 オープンアクセス
  • Shunsuke Takemura
    Earthquake Research Institute The University of Tokyo Bunkyo‐ku Tokyo Japan
  • Akemi Noda
    Earthquake and Tsunami Research Division National Research Institute for Earth Science and Disaster Resilience Tsukuba Ibaraki Japan
  • Tatsuya Kubota
    Network Center for Earthquake, Tsunami and Volcano National Research Institute for Earth Science and Disaster Resilience Tsukuba Ibaraki Japan
  • Youichi Asano
    Network Center for Earthquake, Tsunami and Volcano National Research Institute for Earth Science and Disaster Resilience Tsukuba Ibaraki Japan
  • Takanori Matsuzawa
    Network Center for Earthquake, Tsunami and Volcano National Research Institute for Earth Science and Disaster Resilience Tsukuba Ibaraki Japan
  • Katsuhiko Shiomi
    Network Center for Earthquake, Tsunami and Volcano National Research Institute for Earth Science and Disaster Resilience Tsukuba Ibaraki Japan

書誌事項

公開日
2019-11-07
資源種別
journal article
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1029/2019gl084666
公開者
American Geophysical Union (AGU)

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説明

<jats:title>Abstract</jats:title><jats:p>The spatiotemporal characteristics of shallow slow earthquake activity are linked to the tectonic environments of shallow plate boundaries. In this work, the spatiotemporal variations of shallow very low frequency earthquake (SVLFE) activity along the Nankai Trough were investigated using a cross‐correlation analysis. The SVLFEs migrated or spread eastward along the strike direction of the trench during large SVLFE episodes. Migrations and clusters of SVLFEs suggest the occurrence of shallow slow slip events. The observed lateral variations in SVLFE activity patterns reflect the heterogeneous distributions of effective strengths at the shallow plate boundary along the Nankai Trough. Migrations and clusters of SVLFEs tended to be concentrated in the regions surrounding the stress accumulation peaks on the Philippine Sea Plate boundary. The stress accumulated in the transitional regions between high‐strength and low‐strength zones can be released by shallow slow earthquakes.</jats:p>

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