2012年5月28日唐山MS4.8地震震源机制解和震源深度精确测定

Abstract

Abstract: To get accurate seismic parameters, we used the broadband waveforms data of the Tangshan M_S4.8 earthquake on March, 28, 2012 and the cut-and-paste (CAP) method to obtain the best focal mechanism. And then, combined with a variety of depth phases, we accurately determined the focal depth. The results show that, the earthquake is tension and strike slip. The best double couple solution is 139°, 79° and -17° for strike, dip and slip angles respectively for one nodal plane, and 232°, 73° and -169° for another. The estimated focal depth is 10 km. According to the epicenter and the focal mechanism, This earthquake likely occurred on the Tangshan Fault.

Key words: Focal mechanism, Focal depth, Depth phase, CAP method, Tangshan M_S4.8 earthquake

CLC Number:

P315.7

LI He,ZHANG Hui,WANG Yi-xi,WANG Li-xia,WANG Bao-suo, GAO Ye,CAI Ling-ling,WANG Li-chan,LI Dong-sheng. Acurate Determination of the Focal Mechanism and Depth of the 28 March 2012 Tangshan M_S4.8 Earthquake[J]. EARTHQUAKE, 2017, 37(3): 107-116.

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Acurate Determination of the Focal Mechanism and Depth of the 28 March 2012 Tangshan M_S4.8 Earthquake

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Acurate Determination of the Focal Mechanism and Depth of the 28 March 2012 Tangshan MS4.8 Earthquake

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Acurate Determination of the Focal Mechanism and Depth of the 28 March 2012 Tangshan M_S4.8 Earthquake