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A low velocity zone beneath the Hida Mountains derived from dense array observation and tomographic method
https://nied-repo.bosai.go.jp/records/4989
https://nied-repo.bosai.go.jp/records/49897e7b49ce-2e48-472c-835f-71c2c51dcda3
| Item type | researchmap(1) | |||||||||||||
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| 公開日 | 2023-03-30 | |||||||||||||
| タイトル | ||||||||||||||
| 言語 | en | |||||||||||||
| タイトル | A low velocity zone beneath the Hida Mountains derived from dense array observation and tomographic method | |||||||||||||
| 言語 | ||||||||||||||
| 言語 | eng | |||||||||||||
| 著者 |
M Matsubara
× M Matsubara
× N Hirata
× S Sakai
× Kawasaki, I
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| 抄録 | ||||||||||||||
| 内容記述タイプ | Other | |||||||||||||
| 内容記述 | Seismic waves suffer strong attenuation when propagating beneath the Hida Mountains in Central Honshu, Japan. In order to study this region in detail, we conducted three kinds of dense seismic array observations in and around the Hida Mountains in the summer of 1996. Picking P- and S-wave arrival time data from 54 events at 101 stations, 3175 P- and 2335 S-wave arrival time data were obtained for our tomographic study. Hypocenter locations and velocity structure were determined simultaneously. We assessed ray coverage and resolution of the velocity structure with checkerboard resolution tests. Ray paths for the model of the obtained velocity structure were examined in detail. There are two zones of low P-wave velocity, one at a depth of 4 km and the other at 15 km. The resolution is good at depths of 0-20 km for P-wave velocities and at depths of 0-15 km for S-wave velocities. A high V-P/V-S ratio (2.7) indicates that a partially melting rock exists beneath the Hida Mountains. The deep low velocity zone is located just above the upper/lower crustal boundary. These observations indicate that a magma reservoir exists in the upper crust beneath the Hida Mountains. | |||||||||||||
| 言語 | en | |||||||||||||
| 書誌情報 |
en : EARTH PLANETS AND SPACE 巻 52, 号 3, p. 143-154, 発行日 2000 |
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| 言語 | en | |||||||||||||
| 出版者 | TERRA SCIENTIFIC PUBL CO | |||||||||||||
| ISSN | ||||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||||
| 収録物識別子 | 1343-8832 | |||||||||||||
| DOI | ||||||||||||||
| 関連識別子 | 10.1186/BF03351623 | |||||||||||||
