Detectability analysis of very low frequency earthquakes: methods and application in Nankai using F-net and DONET broad-band seismometers

DOI DOI DOI DOI DOI ほか4件をすべて表示 一部だけ表示 研究データあり 被引用文献4件 参考文献101件 オープンアクセス
  • Shunsuke Takemura
    Earthquake Research Institute, the University of Tokyo , 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032 , Japan
  • Satoru Baba
    Japan Agency for Marine-Earth Science and Technology , 2-15, Natsushima-cho, Yokosuka Kanagawa 237-0061 , Japan
  • Suguru Yabe
    Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology , Tsukuba Central 7, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8567 , Japan
  • Yusuke Yamashita
    Miyazaki Observatory, Disaster Prevention Research Institute, Kyoto University , 3884 Kaeda, Miyazaki 889-2161 , Japan
  • Katsuhiko Shiomi
    National Research Institute for Earth Science and Disaster Resilience , 3-1 Tennodai, Tsukuba, Ibaraki 305-0006 , Japan
  • Takanori Matsuzawa
    National Research Institute for Earth Science and Disaster Resilience , 3-1 Tennodai, Tsukuba, Ibaraki 305-0006 , Japan

書誌事項

公開日
2024-01-23
資源種別
journal article
権利情報
  • https://creativecommons.org/licenses/by/4.0/
DOI
  • 10.1093/gji/ggae033
  • 10.21203/rs.3.rs-2351814/v1
  • 10.21203/rs.3.rs-2351814/v2
  • 10.21203/rs.3.rs-2351814/v4
  • 10.21203/rs.3.rs-2351814/v3
公開者
Oxford University Press (OUP)

この論文をさがす

説明

<jats:title>SUMMARY</jats:title> <jats:p>For a more quantitative discussion of slow earthquake activity, we evaluated the detectable limits of very low frequency earthquakes (VLFEs), which are seismic slow earthquakes observed in very low-frequency (&lt; 0.05 Hz) bands in the Nankai subduction zone. We performed numerical simulations using a local 3-D model and used the observed noise level of permanent broad-band seismometers. First, we investigated the effects of the source-time functions on the maximum amplitudes of the VLFE signals at a certain station. The maximum amplitudes of the VLFE signals were controlled by the VLFE moment rate. The detectable limit of VLFEs at each source location can be defined as the lowest moment rate of detectable VLFEs, which radiate signals larger than the noise levels of any component at ≥ 3 stations. For inland seismometers only, the detectable limits of VLFEs at deep (30–40 km) and shallow (≤ 10 km) depths were 1012–1012.3 and 1012.7 N·m s−1, respectively. Due to the geometrical spreading of VLFE signals and large noise levels in horizontal components, offshore seismometers improved the detectability of shallow VLFEs in regions where seismometers were densely deployed. Based on our detectability and published catalogues, shallow slow earthquakes are less active south-southwest off the Kii Peninsula, where geodetic studies expect mechanical coupling.</jats:p>

収録刊行物

被引用文献 (4)*注記

もっと見る

参考文献 (101)*注記

もっと見る

関連プロジェクト

もっと見る

問題の指摘

ページトップへ