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A new BIEM for rupture dynamics in half-space and its application to the 2008 Iwate-Miyagi Nairiku earthquake
https://nied-repo.bosai.go.jp/records/4769
https://nied-repo.bosai.go.jp/records/47697b30b451-644b-4a69-af6c-47c4a02f7f60
Item type | researchmap(1) | |||||||||
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公開日 | 2023-03-30 | |||||||||
タイトル | ||||||||||
言語 | en | |||||||||
タイトル | A new BIEM for rupture dynamics in half-space and its application to the 2008 Iwate-Miyagi Nairiku earthquake | |||||||||
言語 | ||||||||||
言語 | eng | |||||||||
著者 |
Sebastien Hok
× Sebastien Hok
× Eiichi Fukuyama
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抄録 | ||||||||||
内容記述タイプ | Other | |||||||||
内容記述 | We developed a code for dynamic rupture propagation on arbitrarily shaped faults embedded in half-space using boundary integral equation method (BIEM). It is based on an existing code for the full-space case, in which virtual free surface elements were introduced. Computations in half-space are definitely necessary for the modelling of shallow dipping fault ruptures. First, we describe the implementation and conduct some validation tests that demonstrate the accuracy of the code. The validation tests are carried out by comparing the BIEM results both with the analytical static solution and with the seismic wavefield obtained by a discrete wavenumber method. Then, we apply the code to the study of the 2008 Iwate-Miyagi, Japan, earthquake (M-w 6.9) rupture dynamics. The average stress drop was estimated to be rather large (16 MPa) in the asperity area, while the average strength excess was 5 MPa. The average fracture energy inside the asperity was found to be 36 MJ m(-2). Finally, the free surface effect examination showed that the stress drop and the fracture energy were overestimated at shallow depth in the full-space computation. | |||||||||
言語 | en | |||||||||
書誌情報 |
en : GEOPHYSICAL JOURNAL INTERNATIONAL 巻 184, 号 1, p. 301-324, 発行日 2011-01 |
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出版者 | ||||||||||
言語 | en | |||||||||
出版者 | OXFORD UNIV PRESS | |||||||||
ISSN | ||||||||||
収録物識別子タイプ | ISSN | |||||||||
収録物識別子 | 0956-540X | |||||||||
DOI | ||||||||||
関連識別子 | 10.1111/j.1365-246X.2010.04835.x |