| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2017-10-03 |
| タイトル |
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タイトル |
Temporal changes in coda Q-1 and b value due to the static stress change associated with the 1995 Hyogo-ken Nanbu earthquake |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| ID登録 |
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ID登録 |
10.24517/00010414 |
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ID登録タイプ |
JaLC |
| 著者 |
Hiramatsu, Yoshihiro
Hayashi, Nobuhiko
Furumoto, Muneyoshi
Katao, Hiroshi
|
| 著者別表示 |
平松, 良浩
林, 伸彦
古本, 宗充
片尾, 浩
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| 書誌情報 |
Journal of Geophysical Research B: Solid Earth
巻 105,
号 3,
p. 6141-6151,
発行日 2000-03-10
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| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
0148-0227 |
| NCID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA10819743 |
| DOI |
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関連タイプ |
isIdenticalTo |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1029/1999jb900432 |
| 出版者 |
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出版者 |
American Geophysical Union (AGU) |
| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
The seismicity in the Tamba region, northeast of the Hyogo-ken Nanbu earthquake in Japan (January 17, 1995; M(JMA) 7.2), increased significantly following this earthquake. This increase suggests that the static stress change due to a large earthquake causes a change in the crustal condition of dynamics. In order to reveal the changes quantitatively, we investigate the temporal variation in coda Q-1 and b value in the Tamba region. We analyze the waveform data of many shallow microearthquakes (M 1.5-3.0) in the region recorded in a period from 1987 to 1996. Coda Q-1 is estimated in 10 frequency bands in a range of 1.5-24 Hz based on the single isotropic scattering model. At frequencies between 1.5 and 4.0 Hz the temporal variation in coda Q-1 shows significant correlation with the occurrence of the Hyogo-ken Nanbu earthquake; coda Q-1 increases after the event. A variation in b value whose sign is opposite to that of coda Q-1 is recognized. The fracture dimensions of microearthquakes that contribute to the variation in b value are estimated to be 400 m. This scale length is consistent with the characteristic scale length of scatter, 300-600 m, which contributes effectively to a temporal variation in coda Q-1. The crustal activity in the Tamba region is possibly controlled by the heterogeneity with dominant scale of 102 m. The stress sensitivity of the coda Q-1 change is estimated to be 10 (MPa)-1. This value is an order of magnitude larger than the stress sensitivity of seismic velocity reported before. |
| 著者版フラグ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
SC-PR-HIRAMATSU-Y-6141.pdf (593.7 kB)
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