[1]WANG Jun,SUN Ye-jun,ZHAN Xiao-yan,et al.Investigation on Rupture Parameters of the 2005 MS5.7 Jiujiang-Ruichang, Jiangxi Earthquake and Static Stress Triggering of Its Aftershocks[J].Journal of Seismological Research,2011,34(01):0-.
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Investigation on Rupture Parameters of the 2005 MS5.7 Jiujiang-Ruichang, Jiangxi Earthquake and Static Stress Triggering of Its Aftershocks
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
34
Number of periods:
2011 01
Page number:
0-
Column:
Public date:
2011-03-09
- Title:
- Investigation on Rupture Parameters of the 2005 MS5.7 Jiujiang-Ruichang, Jiangxi Earthquake and Static Stress Triggering of Its Aftershocks
- Keywords:
- Jiujiang-Ruichang MS5.7 earthquake; source rupture parameters; static Coulomb failure stress; triggering of aftershocks
- CLC:
- P315.3+3
- DOI:
- -
- Abstract:
- According to the Doppler Effect in the earthquake rupture process,we use the multi-station spectrum to calculate rupture parameters of the Jiujiang-Ruichang MS5.7 earthquake in Jiangxi.We get the results that the rupture azimuth is about 319.6°,the rupture velocity is about 2.3 km/s,and the fitted minimum correlation-coefficient is about 0.80 by minimum squares.And on this basis,We calculate the variation of static Coulomb stress separately in the two rupture planes of the MS4.8 aftershock.The results show that the variation of the static Coulomb stress separately on two nodal planes are positive,the values are about 0.48 MPa and 0.02 MPa respectively.The variations of static Coulomb stress on nodalⅠ and Ⅱ are very close.Stress-increasing area is mainly located on the right of the main earthquake fault.Stress-reducing area is mainly located to the south of the epicenter.Most of the aftershocks occur in the static Coulomb stress-increasing region,especially on the nodal.This shows the Coulomb failure stress variation caused by the main shock has an important role in triggering of the MS4.8 aftershock,and also conductive to majori aftershocks' occurrence.
- References:
- -
- Similar References:
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Last Update:
2011-03-30