[1]BU Zhuyuan,LI Yujiang,TANG Lei,et al.Seismogenic Fault of the 2016 Hutubi M6.2 Earthquake Constraint from the Borehole Strain Observations[J].Journal of Seismological Research,2021,44(01):64-71.
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Seismogenic Fault of the 2016 Hutubi M6.2 Earthquake Constraint from the Borehole Strain Observations
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
44
Number of periods:
2021 01
Page number:
64-71
Column:
Public date:
2021-01-15
- Title:
- Seismogenic Fault of the 2016 Hutubi M6.2 Earthquake Constraint from the Borehole Strain Observations
- Keywords:
- Hutubi M6.2 earthquake; borehole strain observation; coseismic strain step; coseismic stress field; elastic dislocation theory
- CLC:
- P315.725
- DOI:
- -
- Abstract:
- In this paper,using the borehole strain observation data in the northern Tien Shan area,we analyzed the tensile-compressive characteristics of the coseismic strain step associated with the Hutubi M6.2 earthquake.Based on different source parameters by aftershock relocation etc.,we simulated the tensile-compressive characteristics of the coseismic strain step by the elastic dislocation theory.Through comparing the tensile-compressive characteristics between the modeled and the observed results,we analyzed the seismogenic fault of the Hutubi M6.2 earthquake.The results show that:① The data of the four four-component borehole strain observation stations near the epicenter have the good self-checking performance,which also record the coseismic strain steps successfully.Among them,the strain steps at Hutubi,Shichang and Baluntai stations are more obvious,and the maximum values of the tension and compression of the coseismic strain steps are 2.5×10-8 and-3.4×10-8,respectively.② When the seismic source parameters are 293 ° /64 ° /90 °(strike /dip /rake)and the fault plane inclines to the north,the simulated values of strain tension and compression of borehole are fit well with the measured values,therefore we induced that the Hutubi M6.2 earthquake most likely occurred on a north-trending high-angle blind thrust fault.The results provide an important mechanical basis for understanding the seismotectonics of the 2016 Hutubi M6.2 earthquake.
- References:
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Last Update:
2021-01-15