WEKO3
アイテム
Detectability analysis of very low frequency earthquakes: Methods and application in Nankai using F-net and DONET broadband seismometers
https://nied-repo.bosai.go.jp/records/6530
https://nied-repo.bosai.go.jp/records/6530f5e38ff2-9cac-4c3c-be09-e40751b254d1
| Item type | researchmap(1) | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2025-06-09 | |||||||||||||||||
| タイトル | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| タイトル | Detectability analysis of very low frequency earthquakes: Methods and application in Nankai using F-net and DONET broadband seismometers | |||||||||||||||||
| 言語 | ||||||||||||||||||
| 言語 | eng | |||||||||||||||||
| 著者 |
Shunsuke Takemura
× Shunsuke Takemura
× Satoru BaBa
× Suguru Yabe
× Yusuke Yamashita
× Katsuhiko Shiomi
× Takanori Matsuzawa
|
|||||||||||||||||
| 抄録 | ||||||||||||||||||
| 内容記述タイプ | Other | |||||||||||||||||
| 内容記述 | 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 (< 0.05 Hz) bands in the Nankai subduction zone. We performed numerical simulations using a local three-dimensional model and used the observed noise level of permanent broadband 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 Nm/s, 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 catalogs, shallow slow earthquakes are less active south-southwest off the Kii Peninsula, where geodetic studies expect mechanical coupling." | |||||||||||||||||
| 言語 | en | |||||||||||||||||
| 書誌情報 |
en : Geophysical Journal International 発行日 2024-01-23 |
|||||||||||||||||
| 出版者 | ||||||||||||||||||
| 言語 | en | |||||||||||||||||
| 出版者 | Oxford University Press (OUP) | |||||||||||||||||
| ISSN | ||||||||||||||||||
| 収録物識別子タイプ | EISSN | |||||||||||||||||
| 収録物識別子 | 1365-246X | |||||||||||||||||
| DOI | ||||||||||||||||||
| 関連識別子 | 10.1093/gji/ggae033 | |||||||||||||||||
