2013年岷县漳县6.6级地震前地震b值异常特征研究

Abstract

Abstract: Based on seismic data from the Gansu seismic network since 1990, we calculated b values and Δb values in the epicentral region before the 2013 Minxian-Zhangxian M_S6.6 earthquake. The results show that the earthquake occurred at the margin of significantly low b value area in southeastern Gansu, and before earthquake the area around the epicenter has significantly abnormal Δb values. From the earthquake and the spatial distribution of lower b values, this earthquake does not decrease the possibility of dangerous strong earthquake to occur in this region.

Key words: b value anormaly, Earthquake risk, The 2013 Minxian-Zhangxian M_S6.6 earthquake

CLC Number:

P315.7

FENG Jian-gang, Zhang Hui, YANG Ping. Anormalies of b-value Changes beforey the 2013Minxian-Zhangxian M_S6.6 Earthquake[J]. EARTHQUAKE, 2016, 36(1): 32-37.

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Anormalies of b-value Changes beforey the 2013Minxian-Zhangxian M_S6.6 Earthquake

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Anormalies of b-value Changes beforey the 2013Minxian-Zhangxian MS6.6 Earthquake

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Anormalies of b-value Changes beforey the 2013Minxian-Zhangxian M_S6.6 Earthquake