[1]ZANG Yang,HAN Yanyan,MENG Lingyuan.Stress Influence on Major Faults in the Sichuan-Yunnan Region by Strong Earthquakes near the Burma Arc[J].Journal of Seismological Research,2020,43(02):320-330.
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Stress Influence on Major Faults in the Sichuan-Yunnan Region by Strong Earthquakes near the Burma Arc
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
43
Number of periods:
2020 02
Page number:
320-330
Column:
Public date:
2020-06-10
- Title:
- Stress Influence on Major Faults in the Sichuan-Yunnan Region by Strong Earthquakes near the Burma Arc
- CLC:
- P315.727
- DOI:
- -
- Abstract:
- After collecting and analyzing the focal mechanism solutions of 170 earthquakes from 1969 to 2018 near the Burma arc,we found that the shallow earthquakes are mainly distributed on the Sagaing Fault and in the western part of the Burma arc,usually with a strike-slip mechanism solution. The thrust earthquakes are mainly distributed in the central Burma arc and usually are intermediate earthquakes. While the normal earthquakes mainly distributed in the southern part of the Burma arc. We established the viscoelastic model from the Burma arc to the Sichuan-Yunnan region and using 2 112 discrete points from 129 fault segments of 51 main faults in the Sichuan-Yunnan region as the receiving fault model,then calculated static and cumulative coulomb stress generated by single earthquake model,shallow and intermediate MW≥6.0 earthquakes near the Burma arc from 1969 to 2018,respectively. The results show that the coulomb stress influence in the Sichuan-Yunnan region generated by intermediate earthquakes near the Burma arc is limited,generally negligible. The coulomb stress in the Sichuan-Yunnan region generated by shallow earthquakes is much greater than caused by intermediate earthquakes near the Burma arc. The total cumulative coulomb stress in the Sichuan-Yunnan region generated by all of the MW≥6.0 earthquakes near the Burma arc from 1969 to 2018 is less than 0.1 bar,and the strongest stress loading area concentrated in the region from Xiaodianxi to northwest of Yunnan.
- References:
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Last Update:
2020-06-10