A feasibility test of CMT inversion using regional network of broad-band strong-motion seismographs for near-distance large earthquakes
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- Cho Ikuo
- Division of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University Department of Geophysics, Kyoto University
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- Nakanishi Ichiro
- Department of Geophysics, Kyoto University
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- Sato Tamao
- Department of Earth and Environmental Sciences, Hirosaki University
書誌事項
- タイトル別名
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- feasibility test of CMT inversion Using regional network of broad-band strong-motion seismographs for near-distancelargeearthquakes
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When a large earthquake occurs in and around the Japanese Islands, we should immediately determine the size and the fault geometry of the earthquake to mitigate earthquake disasters. Broad-band, strong-motion data of near-distance large earthquakes are used to investigate the possibility of CMT inversion. We perform a moment tensor inversion using the data sets of the 1993 Hokkaido Nansei-oki earthquake (MJMA 7.8), the 1994 Hokkaido Toho-oki earthquake (MJMA 8.1) and the 1994 Sanriku Haruka-oki earthquake (MJMA 7.5). The accuracy of the solutions is examined by comparison with the solutions derived from global data sets, which reveals that the mechanism and moment magnitude are quite adequate for the purpose. Numerical experiments are made to analyze the influence of the source finiteness on the solutions. The numerical experiments suggest that the influence of the source finiteness on the mechanism retrieval is smaller than that on the moment retrieval. We suggest the installation of a network system of broad-band, strong-motion seismographs in the Japanese Islands.
収録刊行物
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- Earth, Planets and Space
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Earth, Planets and Space 51 (4), 247-254, 1999
地球電磁気・地球惑星圏学会 、公益社団法人 日本地震学会、特定非営利活動法人 日本火山学会、日本測地学会、日本惑星科学会
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詳細情報
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- CRID
- 1390001206510647808
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- NII論文ID
- 10003737639
- 130003955985
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- NII書誌ID
- AA11211921
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- ISSN
- 18805981
- 13438832
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- NDL書誌ID
- 4726118
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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