[1]WU Weiwei.Stress Distribution Characteristics of Faults Intersection in Anninghe-Zemuhe Fault Zone and Its Adjacent Area[J].Journal of Seismological Research,2020,43(04):601-609.
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Stress Distribution Characteristics of Faults Intersection in Anninghe-Zemuhe Fault Zone and Its Adjacent Area
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
43
Number of periods:
2020 04
Page number:
601-609
Column:
Public date:
2020-09-17
- Title:
- Stress Distribution Characteristics of Faults Intersection in Anninghe-Zemuhe Fault Zone and Its Adjacent Area
- CLC:
- P315.727
- DOI:
- -
- Abstract:
- According to the characteristics of tectonic activity,we divided the Anninghe-Zemuhe fault zone and its adjacent areas into three sections,and analyzed the local stress field and seismicity characteristics in different fault intersection areas by using the fault plane solutions of multi-earthquakes and the focal parameter results of medium and small earthquakes.The results show that the faults in the northern section of the study area intersect show an “λ” shape,with high stress concentration,high frequency of seismicity,large magnitude,and high stress drops.In the middle section,the faults in Anninghe seismic gap show an “obtuse angle” intersection,with low frequency of seismicity and low stress drops.While the faults on the east side of the seismic gap show a “Y” shape intersection,with high frequency of small and medium earthquakes and middle stress drops.In the south section,faults intersect is in a “Y” shape,which do not have the structural conditions of high stress concentration.Although the seismic activity in this intersect area is high and the magnitudes of the earthquakes are large,the stress drops are generally in the middle.We obtained that the segmental difference in seismic activity and stress distribution in the study area is related to the form of interaction between faults,and the deformation inconsistency between cross faults has a great influence on local stress fields and seismic risk.
- References:
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Last Update:
2020-09-17