2011年5月20日山东安丘ML3.7地震发震断层参数测定

Abstract

Abstract: By considering 1D finite moving source model propagating unilaterally, the corner frequency is employed to determine the azimuth of rupture propagation direction and the parameters of fault plane of the Shandong Anqiu M_L3.7 earthquake on May 20, 2011, by means of correlation coefficient method. The results show that the azimuth angle of the fault plane for this event is about 112.2°, consistent with the EW nodal plane of the focal mechanism solution. The seismic Mach number v/c is about 0.2695, which means that the average rupture velocity is about a quarter of the S-wave velocity. Given the velocity of S wave 3.5 km/s, the fault length is about 0.1162 km.

Key words: Corner frequency, Correlation coefficient method, Parameters of fault plane, Seismic Mach number

CLC Number:

P315.7

LI Yan'e, GUO Xiang-yun, WANG Heng-xin, CHEN Xue-zhong. Fault Plane Determination for the 2011 M_L3.7 Anqiu Earthquake, Shandong Province[J]. EARTHQUAKE, 2012, 32(3): 52-58.

References

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Fault Plane Determination for the 2011 M_L3.7 Anqiu Earthquake, Shandong Province

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Fault Plane Determination for the 2011 ML3.7 Anqiu Earthquake, Shandong Province

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Fault Plane Determination for the 2011 M_L3.7 Anqiu Earthquake, Shandong Province