Dynamic source modeling of the 1978 and 2005 Miyagi‐oki earthquakes: Interpretation of fracture energy
Dynamic source modeling of the 1978 and 2005 Miyagi‐oki earthquakes: Interpretation of fracture energy
复制标题
1978 年和 2005 年宫城冲地震的动力源模拟:断裂能的解释
DOI:
10.1029/2009jb006758
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发表时间:
2010
影响因子:
--
通讯作者:
T. Miyatake
中科院分区:
文献类型:
--
作者:
Takeshi Kimura;K. Koketsu;H. Miyake;Changjiang Wu;T. Miyatake
[1] We constructed spontaneous dynamic rupture models of the 1978 and 2005 Miyagi-oki, Japan, earthquakes, which occurred on the same plate boundary repeatedly with different magnitudes, to reproduce the slip and the rupture velocity predicted by kinematic source models. Comparison of the dynamic source parameters of these events enables us to consider the behavior of rupture dynamics during different source processes on the same fault. In particular, we compared the stress drop and the fracture energy, which can be evaluated stably, between two events. The maximum and average values of the stress drop over the whole fault plane and on an asperity that ruptured during both events are almost identical in the two models. On the other hand, the 1978 event, whose magnitude was larger than the 2005 event, has a fracture energy value larger than that of the 2005 event not only over the whole fault but also on the asperity that ruptured repeatedly. These results are consistent with previous studies of the scaling of fracture energy with the seismic moment. We also compared the fracture energy values with those of other inland events estimated for previous studies; our values for the Miyagi-oki earthquakes are smaller. Differences in tectonic setting between shallow inland events and deep subduction-zone events might cause this discrepancy.
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DOI:
10.1186/bf03352855
发表时间:
2008-10
期刊:
Earth, Planets and Space
影响因子:
--
作者:
S. Murotani;H. Miyake;K. Koketsu
通讯作者:
S. Murotani;H. Miyake;K. Koketsu
DOI:
--
发表时间:
1975-10
期刊:
--
影响因子:
--
作者:
H. Kanamori;D. L. Anderson
通讯作者:
H. Kanamori;D. L. Anderson
影响因子:
--
作者:
Y. Yamanaka;M. Kikuchi
通讯作者:
Y. Yamanaka;M. Kikuchi
影响因子:
3
作者:
Y. Okada
通讯作者:
Y. Okada
影响因子:
3
作者:
Kanamori, Hiroo;Miyazawa, Masatoshi;Mori, Jim
通讯作者:
Mori, Jim