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| Rupture process of the 2011 Tohoku earthquake from the joint inversion of teleseismic and GPS data |
| Yong Zhang, Lisheng Xu, Yun-tai Chen |
| Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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Abstract Teleseismic and GPS data were jointly inverted for the rupture process of the 2011 Tohoku earthquake. The inversion results show that it is a bilateral rupture event with an average rupture velocity less than 2.0 km/s along the fault strike direction. The source rupture process consists of three sub-events, the first occurred near the hypocenter and the rest two ruptured along the up-dip direction and broke the sea bed, causing a maximum slip of about 30 m. The large-scale sea bed breakage may account for the tremendous tsunami disaster which resulted in most of the death and missing in this mega earthquake.
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Received: 19 December 2011
Published: 10 April 2012
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| Fund:the National Natural Science Foundation of China (Nos. 90915012 and 41090291), and the Research Project in Earthquake Science, CEA (No. 201108002) |
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Corresponding Authors:
Yun-tai Chen
E-mail: chenyt@cea-igp.ac.cn
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