1 School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China 2 Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
Spatio-temporal characteristics of strong aftershocks of the MS8.0 Wenchuan earthquake
1 School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China 2 Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
摘要Based on Gutenberg-Richter’s relation, Bath’s law, Omori’s law and Well’s relation of rupture scale, this paper forecasts the temporal decay, total number, possible area and greatest magnitude of strong aftershocks (greater than or equal to M6.0) of the MS8.0 Wenchuan earthquake by using the magnitude and statistical parameters of earthquakes in California area of USA. The number of strong aftershocks, the parameters of Gutenberg-Richter’s relation and the modified form of Omori’s law are validated based on the relocation data of aftershock sequence of the MS8.0 Wenchuan earthquake. Moreover, the spatio-temporal characteristics and wave energy release of the strong aftershocks (M≥6.0) are analyzed. The result shows that strong aftershocks may occur at the end of local drop and sharp drop on the wave energy release curve.
Abstract:Based on Gutenberg-Richter’s relation, Bath’s law, Omori’s law and Well’s relation of rupture scale, this paper forecasts the temporal decay, total number, possible area and greatest magnitude of strong aftershocks (greater than or equal to M6.0) of the MS8.0 Wenchuan earthquake by using the magnitude and statistical parameters of earthquakes in California area of USA. The number of strong aftershocks, the parameters of Gutenberg-Richter’s relation and the modified form of Omori’s law are validated based on the relocation data of aftershock sequence of the MS8.0 Wenchuan earthquake. Moreover, the spatio-temporal characteristics and wave energy release of the strong aftershocks (M≥6.0) are analyzed. The result shows that strong aftershocks may occur at the end of local drop and sharp drop on the wave energy release curve.
基金资助:Basic Science and Research Fund for Chinese Commonweal Institutes under grant No. 2008B07, the National Natural Science Foundation of China under grant No. 90715042, Special Research Project of Earthquake Engineering under grant No. 200808008, and National Science and Technology Support Plan under grant No. 2006BAC13B02
通讯作者:
Jisheng Zhao
E-mail: jisheng_zhao@163.com
引用本文:
Jisheng Zhao, Yanqiong Liu, Zhenghua Zhou, Chenggang Zhao. Spatio-temporal characteristics of strong aftershocks of the MS8.0 Wenchuan earthquake[J]. 《地震学报》英文版, 2010, 23(3): 215-221.
Jisheng Zhao, Yanqiong Liu, Zhenghua Zhou, Chenggang Zhao. Spatio-temporal characteristics of strong aftershocks of the MS8.0 Wenchuan earthquake. Earthquake Science, 2010, 23(3): 215-221.