EARTHQUAKE ›› 2004, Vol. 24 ›› Issue (3): 107-114.
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ZHONG Yu-yun, ZHU Xin-yun, ZHANG Zhen-feng
Online:
Published:
Abstract: Based on the spectral analysis of moderate and small earthquakes occurred in 2002 in Shanxi reservoir, Wenzhou, Zhejiang Province, we calculated seismic moment M0, source radius a, stress drop et al. The results show: ① the relation between seismic moment and magnitude: log M0=1.07 ML+10.3; ② stress drop of 60% earthquakes are from 0.018 MPa. If>0.049 MPa we think that tress of the earthquake region was anomalous. The stress now is normal; ③ stress drop of earthquake region is fractal, the fractal dimension D=0.85 is a low value; it indicates that strength of media and stress distribution in earthquake region are inhomogeneous.
Key words: Shanxi earthquake swarm, Spectral analysis, Source parameter
CLC Number:
P315.3
ZHONG Yu-yun, ZHU Xin-yun, ZHANG Zhen-feng. Source parameter characteristics of ML3.9 earthquake swarm occurred in Shanxi reservoir,Wenzhou, Zhejiang Province[J]. EARTHQUAKE, 2004, 24(3): 107-114.
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URL:
https://dizhen.ief.ac.cn/EN/Y2004/V24/I3/107