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Rupture process of the 2005West Off Fukuoka Prefecture earthquake obtained from strong motion data of K-NET and KiK-net
https://nied-repo.bosai.go.jp/records/4991
https://nied-repo.bosai.go.jp/records/4991b93ce287-8eea-4bf9-a01f-3dfc6a6492a5
| Item type | researchmap(1) | |||||||||||||||||||||||||||||
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| 公開日 | 2023-03-30 | |||||||||||||||||||||||||||||
| タイトル | ||||||||||||||||||||||||||||||
| 言語 | ja | |||||||||||||||||||||||||||||
| タイトル | Rupture process of the 2005West Off Fukuoka Prefecture earthquake obtained from strong motion data of K-NET and KiK-net | |||||||||||||||||||||||||||||
| タイトル | ||||||||||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||||||||
| タイトル | Rupture process of the 2005West Off Fukuoka Prefecture earthquake obtained from strong motion data of K-NET and KiK-net | |||||||||||||||||||||||||||||
| 言語 | ||||||||||||||||||||||||||||||
| 言語 | eng | |||||||||||||||||||||||||||||
| 著者 |
Sekiguchi Haruko
× Sekiguchi Haruko
× Aoi Shin
× Honda Ryou
× Morikawa Nobuyuki
× Kunugi Takashi
× Fujiwara Hiroyuki
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| 抄録 | ||||||||||||||||||||||||||||||
| 内容記述タイプ | Other | |||||||||||||||||||||||||||||
| 内容記述 | We have investigated the rupture process of the 2005 West Off Fukuoka Prefecture earthquake by the multitime-window linear waveform inversion method using the strong ground motion data recorded at 11 K-NET and KiK-net stations. From the waveforms of the <I>P</I>-wave portion, it is indicated that the energy release in the first few seconds was markedly lower than the subsequent part, and this causes difficulty in identifying onset of the S-wave. To decide an appropriate time window for the waveform inversion, we estimate the S-wave onset using aftershock records. The inverted slip distribution shows a single asperity of 8 km × 6 km and its center located 8 km to the southeast and 6 km above the hypocenter. The asperity explains most of the large-amplitude signals in the observed waveforms. The turning point from the initial low-energy-release rupture to the main high-energyrelease rupture is estimated from the spatial variation of the observed initial rupture phase. It is found 3.3 s after the initiation of the rupture at about 4 km to the southeast of the hypocenter. Stress drop during the initial rupture is estimated to be in the same order of those of moderate size aftershocks, which indicates that the initial rupture is an ordinary dynamic rupture. | |||||||||||||||||||||||||||||
| 言語 | ja | |||||||||||||||||||||||||||||
| 抄録 | ||||||||||||||||||||||||||||||
| 内容記述タイプ | Other | |||||||||||||||||||||||||||||
| 内容記述 | We have investigated the rupture process of the 2005 West Off Fukuoka Prefecture earthquake by the multitime-window linear waveform inversion method using the strong ground motion data recorded at 11 K-NET and KiK-net stations. From the waveforms of the <I>P</I>-wave portion, it is indicated that the energy release in the first few seconds was markedly lower than the subsequent part, and this causes difficulty in identifying onset of the S-wave. To decide an appropriate time window for the waveform inversion, we estimate the S-wave onset using aftershock records. The inverted slip distribution shows a single asperity of 8 km × 6 km and its center located 8 km to the southeast and 6 km above the hypocenter. The asperity explains most of the large-amplitude signals in the observed waveforms. The turning point from the initial low-energy-release rupture to the main high-energyrelease rupture is estimated from the spatial variation of the observed initial rupture phase. It is found 3.3 s after the initiation of the rupture at about 4 km to the southeast of the hypocenter. Stress drop during the initial rupture is estimated to be in the same order of those of moderate size aftershocks, which indicates that the initial rupture is an ordinary dynamic rupture. | |||||||||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||||||||
| 書誌情報 |
ja : Ｅａｒｔｈ， Ｐｌａｎｅｔｓ ａｎｄ Ｓｐａｃｅ en : Earth, Planets and Space 巻 58, 号 1, p. 37-43, 発行日 2006 |
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| 言語 | ja | |||||||||||||||||||||||||||||
| 出版者 | 公益社団法人 日本地震学会、地球電磁気・地球惑星圏学会 、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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| 言語 | en | |||||||||||||||||||||||||||||
| 出版者 | The Seismological Society of Japan, Society of Geomagnetism and Earth, Planetary and Space Sciences, The Volcanological Society of Japan , The Geodetic Society of Japan , The Japanese Society for Planetary Sciences | |||||||||||||||||||||||||||||
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| 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/BF03351911 | |||||||||||||||||||||||||||||
