Source Characteristics and Along-Strike Variations of Shallow Very Low Frequency Earthquake Swarms on the Nankai Trough Shallow Plate Boundary

Shunsuke Takemura, Satoru Baba, Suguru Yabe, Kentaro Emoto, Katsuhiko Shiomi, Takanori Matsuzawa

研究成果: ジャーナルへの寄稿学術誌査読

抄録

We detected shallow very low frequency earthquakes (VLFEs) off the Cape Muroto and Kii Channel in the Nankai subduction zone and estimated their moment rate functions. Combining the new and previously estimated catalogs, we obtained the comprehensive catalog of shallow VLFE moment rate functions along the Nankai Trough. We defined the shallow VLFE swarms and investigated the scaling relationships of their cumulative moments, activity area, and durations in each region. Detected swarms were considered candidates for shallow slow slip events. A similar scaling relationship was observed between the cumulative moments and activity areas, irrespective of regions. It indicates similar stress drops in each region. However, the relationship between the cumulative moments and durations varied. This difference was explained by the along-strike variations in the faulting conditions of shallow slow earthquakes, such as material or hydrological properties.

本文言語英語
論文番号e2022GL097979
ジャーナルGeophysical Research Letters
49
11
DOI
出版ステータス出版済み - 6月 16 2022

!!!All Science Journal Classification (ASJC) codes

  • 地球物理学
  • 地球惑星科学(全般)

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