Abstract:In 2019,the Beiliu M S 5.2 and Jingxi M S 5.2 earthquakes occurred successively in Guangxi,China,with an interval of only one month,which is a rare phenomenon since earthquake records began in Guangxi.In this study,the Coulomb failure stress changes of the Beiliu MS 4.2 foreshock to its MS 5.2 mainshock,Jingxi M S 5.2 mainshock to its MS 4.3 aftershock,and Beiliu MS 5.2 earthquake to the Jingxi MS 5.2 earthquake were calculated.The results show the following: The Beiliu MS 4.2 foreshock may have an obvious dynamic and static stress-triggering effect on the MS .2 mainshock.The Jingxi MS 5.2 mainshock may have a dynamic stress-triggering effect and static Coulomb stress-restraining effect on the MS 4.3 aftershock.The occurrence of the Jingxi MS 4.3 aftershock may be the result of the combined action of the tectonic stress field and dynamic stress triggering of the MS 5.2 mainshock.Because of the small magnitude and long distance,the Coulomb stress-triggering effect of the Beiliu MS 5.2 earthquake on the Jingxi MS 5.2 earthquake is not obvious.
