[1]LI Qilei,LI Yuli,MA Li,et al.Calculation of Focal Mechanism and Source Depth of Qinghai Menyuan MS6.4 Earthquake in 2016[J].Journal of Seismological Research,2016,39(增刊):55-61.
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Calculation of Focal Mechanism and Source Depth of Qinghai Menyuan MS6.4 Earthquake in 2016
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
39
Number of periods:
2016 Supplementary
Page number:
55-61
Column:
Public date:
2016-11-20
- Title:
- Calculation of Focal Mechanism and Source Depth of Qinghai Menyuan MS6.4 Earthquake in 2016
- Keywords:
- Menyuan MS6.4 earthquake; CAP method; focal mechanism; source depth; sPn phase
- CLC:
- P315.7
- DOI:
- -
- Abstract:
- By using the CAP(cut and paste)method,we inversed the focal mechanism solution of Menyuan MS6.4 earthquake on Jan.21,2016,and analyzed its variation relationship with the source depth. The calculation results show that the seismogenic fault of the earthquake is a thrust type fault,and the optimum moment depth is 11 km. We also inverse the focal mechanism solution of Menyuan MS5.1 earthquake on Sep.20,2013 and find that the strikes and dip angles of two Menyuan earthquakes are basically the same. In order to verify the reliability of the calculation results of the focal depth,we extract the sPn phase by the sliding window cross-correlation technology. Then we obtain the focal depth is 15.2 km by calculating the arrival time difference between sPn and Pn phases. However,because of the accuracy of phase identification and speed model of focal depth-phase method could induce the error of 10%～15%,the focal depth is close to the results calculated by the CAP method after correction.
- References:
- -
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Last Update:
2016-10-20