• 责任者：Wang Jun (Earthquake Administration of Jiangsu Province ; Nanjing 210014 ; China) ; Sun Yejun
• 刊名：Journal of Seismological Research
• 出版年：2011
• 卷期：34(1)
• 关键词：强震 ; strong earthquakes ; 地震参数 ; earthquake parameters ; 江西 ; Jiangxi Province
• 页码：p.52-58
• 图表：3 illus., 4 tables, 23 refs.
• 分类号：0500
• issnNo：ISSN1000-0666
• isbnNo：CN53-1062/P

According to the Doppler Effect in the earthquake rupture process, the authors use the multi-station spectrum to calculate rupture parameters of the Jiujiang-Ruichang M_s5.7 earthquake in Jiangxi. The authors 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, the authors calculate the variation of static Coulomb stress separately in the two rupture planes of the M_s4.8 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 M_s4.8 aftershock, and also conductive to majori aftershocks’ occurrence.