| Study on the earthquake fault of the Lulong ML=6.2 earthquake by precise relocation of aftershock |
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| 作者姓名： | 李文军 王培德 李春来 陈棋福 |
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| 作者单位： | Institute of Geophysics，China Earthquake Administration，Institute of Geophysics，China Earthquake Administration，Beijing 100081，China，Institute of Geophysics，China Earthquake Administration，Beijing 100081，China，Institute of Earthquake Science，China Earthquake Administration，Beijing 100036，China Beijing 100081，China Institute of Earthquake Science，China Earthquake Administration，Beijing 100036，China |
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| 基金项目： | National Natural Science Foundation of China (40234038). |
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| 摘 要： | Introduction The Lulong county is about 75 km northeast to Tangshan in Hebei Province. An earthquake of ML=6.2 took place on October 19, 1982 about 4 km northeast to the county town. The epicenter of the mainshock is located at 39°57′N, 119°04′E by the Beijing seismic network. The 1976 Tang- shan 7.8 earthquake and the successive Luanxian 7.1, Ninghe 6.9 and the Lulong earthquake spread in NE-SW direction in space. SONG and WANG et al of Institute of Geophysics, China Seismolog…
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Study on the earthquake fault of the Lulong ML=6.2 earthquake by precise relocation of aftershock |
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| LI Wen-jun,WANG Pei-de,LI Chun-lai,CHEN Qi-fu.Study on the earthquake fault of the Lulong ML=6.2 earthquake by precise relocation of aftershock[J].Acta Seismologica Sinica(English Edition),2005,18(4). |
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| Authors: | LI Wen-jun WANG Pei-de LI Chun-lai CHEN Qi-fu |
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| Abstract: | We have selected 171 near-field records from 391 aftershock records of the Lulong, Hebei Province, earthquake in October 1982 and relocated the hypocenter of 45 aftershocks using the program Hypoinverse. The distribution of aftershocks reveals a set of earthquake faults: a WNW stretching fault truncates two NNE stretching faults. The two branches of faults show the conjugate structure which is often seen in brittle fracture. The NNE stretching faults are connected together. The Luanhe river valley near Lulong developed to a rudiment rift basin surrounded by a series of faults. The fault of Lulong earthquake is a strike-slip fault with tension component. This fault type matches with the activity of Zhangjiakou-Bohai seismic belt (Zhang-Bo belt) and also shows the action of Zhang-Bo belt as a boundary of two secondary active blocks that truncates the NNE fault. |
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| Keywords: | ML=6 2 earthquake Zhangjiakou-Bohai seismic belt Hypoinverse location method seismogenic structure |
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