[1]HUANG Hao,YUAN Fuquan,LI Li,et al.Earthquake Relocation and Seismic Tectonic Background of the 2022 Delingha MS6.0 Earthquake Sequence[J].Journal of Seismological Research,2023,46(04):473-482.[doi:10.20015/j.cnki.ISSN1000-0666.2023.0050
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Earthquake Relocation and Seismic Tectonic Background of the 2022 Delingha MS6.0 Earthquake Sequence
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
46
Number of periods:
2023 04
Page number:
473-482
Column:
Public date:
2023-07-15
- Title:
- Earthquake Relocation and Seismic Tectonic Background of the 2022 Delingha MS6.0 Earthquake Sequence
- Keywords:
- the Delingha earthquake; earthquake relocation; focal mechanism; seismic tectonic background; Qinghai
- CLC:
- P315.72
- DOI:
- 10.20015/j.cnki.ISSN1000-0666.2023.0050
- Abstract:
- A 5.8-magnitude,a 6.0-magnitude,and a 5.4-magnitude earthquake occurred respectively on Jan.23,Mar.26 and Apr.15,2022 in Delingha city of Qinghai province.We firstly inverted the focal mechanisms and the centroid depth of the source of the MS6.0 main shock and other 6 MS≥3.7 aftershocks by the CAP method,then we relocated the sources of the MS6.0 earthquake sequence by the hypoDD method,and analyzed the characteristics of the focal mechanisms,the relocated source parameters and the seismogenic structure.The focal mechanism of the Delingha MS6.0 earthquake has 2 solutions:for the first nodal plane,strike is 174°,dip is 80°,rake is -156°.For the second nodal plane,strike is 79°,dip is 66°,rake is -11°.The centroid depth is 6 km.The sources of the MS6.0 earthquake sequence are mainly distributed in North-South direction.According to the focal mechanism,relocated source parameters,and the geological structure in the source region,the seismogenic structure of the MS6.0 earthquake sequence is a hidden fault with high dip angel in North-South direction.
- References:
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Last Update:
2023-10-01