首都圈中强震前后视应力时空演化过程研究*

Abstract

Abstract: Using the near-source Brune model,we calculate apparent stresses of M_L≥2.0 earthquakes occurred in the capital area of China since 2002using seismic waveform data recorded by the Capital Circle Digital Seismic Network.We discussed scaling relations of source parameters,and choose the 2.0≤ M_L≤2.9earthquakes to analyze and discuss anomalous variation characteristics in time and space before medium-strong earthquakes. The results show that apparent stresses have an obvious high value anomaly before many medium-strong earthquakes,and the earthquakes occurred 82.0 24.3 at high value anomaly area.It can be seen that apparent stress state of can provide evidence for seismic risk analysis in the capital region.

Key words: Apparent stresses, Anomaly characteristics, Space-time varivation, The capital circle area of China

CLC Number:

P315.7

YUE Xiao-yuan, WU An-xu, FENG Gang, LI Hong, WU Min-jie. Temporal-spatial Evolution of Apparent Stresses before Moderate-strong Earthquakes in the Capital Circle Area of China[J]. EARTHQUAKE, 2016, 36(2): 119-131.

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Temporal-spatial Evolution of Apparent Stresses before Moderate-strong Earthquakes in the Capital Circle Area of China

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