作者机构:[1]Institute of Geophysics, China Earthquake Administration, Beijing 100081, China
相关基金:Acknowledgements This study is supported by the Special Funds for Sciences and Technology Research (No. 200708003 and No. 200808008) and National Natural Science Foundation of China (No. 90715020). Contribution No. is 10FE3001, Institute of Geophysics, China Earthquake Administration.