渭河断陷盆地及邻区环境剪应力场及其与震源参数关系研究

EARTHQUAKE ›› 2005, Vol. 25 ›› Issue (4): 113-118.

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The distribution of ambient shear stress field and its relevancy to focal parameters in Weihe fault depression and its adjacent areas

WANG Wei-dong¹, PENG Jian-bing¹, ZHANG Yong-zhi¹, MENG Zhi-min²

1. School of Geological Engineering and Surveying Engineering, Chang′an University; Xi′an 710054;
2. Earthquake Administration of Shaanxi Province, Xi′an 710068, China

Received:2005-04-22 Revised:2005-06-15 Online:2005-10-31 Published:2021-11-10

Abstract

Abstract: In this paper, by using the broad digital data recorded by Shaanxi digital seismic network, the focal parameters and the ambient shear stress field in Weihe fault depression and its adjacent areas are determined. The results show that the ambient shear stress is low in this region, and the average value is 12.7×10⁵ Pa. The seismicity in this region is then discussed. The relations between ambient shear stress and magnitude M_L, seismic moment M₀ and moment magnitude M_W are established and analyzed. And the relation between the ambient shear stress and the focal depth is discussed.

Key words: Weihe fault depression, Ambient shear stress, Seismicity, Focal parameter

CLC Number:

WANG Wei-dong, PENG Jian-bing, ZHANG Yong-zhi, MENG Zhi-min. The distribution of ambient shear stress field and its relevancy to focal parameters in Weihe fault depression and its adjacent areas[J]. EARTHQUAKE, 2005, 25(4): 113-118.

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The distribution of ambient shear stress field and its relevancy to focal parameters in Weihe fault depression and its adjacent areas

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