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Imaging the high-frequency energy radiation process of a main shock and its early aftershock sequence: The case of the 2008 Iwate-Miyagi Nairiku earthquake, Japan
http://hdl.handle.net/2241/00122186
http://hdl.handle.net/2241/00122186dd375621-ebd1-4244-8e1d-c6c2716f306f
名前 / ファイル | ライセンス | アクション |
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JGRS_119-6 (2.9 MB)
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Item type | Journal Article(1) | |||||
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公開日 | 2014-09-26 | |||||
タイトル | ||||||
タイトル | Imaging the high-frequency energy radiation process of a main shock and its early aftershock sequence: The case of the 2008 Iwate-Miyagi Nairiku earthquake, Japan | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Sawazaki, Kaoru
× Sawazaki, Kaoru× Enescu, Bogdan |
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著者別名 |
エネスク, ボグダン
× エネスク, ボグダン |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | To understand the energy release process that operates at the end of the main shock rupture and start of the aftershock activity, we propose an inversion method that uses continuous high-frequency seismogram envelopes of the main shock and early aftershocks (i.e., events that occur at short times after the main shock). In our approach, the aftershock sequence is regarded as a continuous energy release process, rather than a discrete time series of events. To correct for the contribution of coda wave energy excited by multiple scattering, we use the theoretical envelope synthesized on the basis of the radiative transfer theory as a Green's function. The site amplification factors are corrected considering the conservation of energy flux and using the coda normalization method. The inverted temporal energy release rate for the 2008 MW 6.9 Iwate-Miyagi Nairiku earthquake, Japan, decays following t−1.1, at the lapse time t of 40–900 s after the main shock origin time. This exponent of the decay rate is similar to the p value of the modified Omori law. The amount of estimated energy release is consistent with that calculated from the magnitude listed in the aftershock catalog. Although the uncertainty is large, the location of large energy release at the lapse times of 40–900 s approximately overlaps to that of the aftershocks, which surrounds the large energy release area during the main shock faulting. The maxima of the energy release rate normalized by the average decay rate distributes following a power law, similar to the Gutenberg-Richter law. | |||||
書誌情報 |
Journal of geophysical research: Solid Earth 巻 119, 号 6, p. 4729-4746, 発行日 2014-06 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0148-0227 | |||||
PubMed番号 | ||||||
識別子タイプ | PMID | |||||
関連識別子 | 25033286 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1002/2013JB010539 | |||||
権利 | ||||||
権利情報 | ©2014. The Authors.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. | |||||
著者版フラグ | ||||||
値 | publisher | |||||
出版者 | ||||||
出版者 | American Geophysical Union |