Abstract Based on the observation data recorded by Capital circle earthquake network, the mainshock epicenter of the 2016-09-10 Tangshan M4.1 earthquake is accurately determined by the Hypo2000 method. The best double-couple solution of the plane Ⅰ of the mainshock is 122°, 60°, and -42° for strike, dip, and rake angle respectively; the plane Ⅱ is 236°, 54°, and -142°; the moment magnitude is MW4.3, which are analyzed by local waveforms inversion method. Combining with local earthquake depth phase sPL, the focal depth is determined as 6 km. The aftershocks are relocated by hypoDD, the results show that the focal depths are in the range of 4~9 km, distributed within a straight zone, indicating that the seismogenic fault should be a NE-trending fault with high dip, the characteristic of which is consistent with plane Ⅱ. We infer that plane Ⅱ is the seismogenic fault plane, and plane I is the auxiliary plane. Compared the parameters of the seismogenic fault with the properties of local faults, it shows that the seismogenic fault of Tangshan earthquake should be the Tangshan-Fengnan fault.
YIN Hongwei,GAO Dengping,LIANG Lihuan et al. Research on Focal Parameters and Seismogenic Fault of the 2016 Tangshan M4.1 Earthquake Using Local Waveforms[J]. jgg, 2020, 40(7): 688-691.
YIN Hongwei,GAO Dengping,LIANG Lihuan et al. Research on Focal Parameters and Seismogenic Fault of the 2016 Tangshan M4.1 Earthquake Using Local Waveforms[J]. jgg, 2020, 40(7): 688-691.