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  1. 防災科研関係論文

Exploitation of high-sampling Hi-net data to study seismic energy scaling: The aftershocks of the 2000 Western Tottori, Japan, earthquake

https://nied-repo.bosai.go.jp/records/5002
https://nied-repo.bosai.go.jp/records/5002
e0960d6d-fd30-477e-905c-5670b388bc01
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 en
タイトル Exploitation of high-sampling Hi-net data to study seismic energy scaling: The aftershocks of the 2000 Western Tottori, Japan, earthquake
言語
言語 eng
著者 S Ide

× S Ide

en S Ide

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M Matsubara

× M Matsubara

en M Matsubara

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K Obara

× K Obara

en K Obara

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抄録
内容記述タイプ Other
内容記述 High-quality seismic data with broad frequency band are essential for the study of seismic energy, E-s, and its scaling with seismic moment, M-o. The 2000 Western Tottori earthquake (M-w 6.6) and its aftershocks as recorded by NI D Hi-net including undistributed high-sampling data provide an excellent data set for this purpose. In this study we use: 1) regular data sampled at 100 sps of small and intermediate (M 2-4) aftershocks just after the mainshock, and, 2) 100 sps data and high sampling 1000 sps data of small events (M 0-3) about two years after the mainshock. Spectral ratios are calculated between all combinations of events that both occurred close to one another and had similar mechanisms. We calculated seismic energies of P and S waves for each event by fitting omega-square spectral models to the spectral ratios. Analysis of both the high and lower sampling rate data results in statistically significant size dependence of E-s/M-o; however, none of these trends can explain overall scaling when all events, including the mainshock, are considered. Artificial size dependence due to band limitation and omega-square assumption may be responsible for the apparent trends.
言語 en
書誌情報 en : EARTH PLANETS AND SPACE

巻 56, 号 9, p. 859-871
出版者
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/BF03352533
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