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计算和研究了1976年云南龙陵Ms7.3、Ms7.4双主震产生的完全库仑破裂应力变化及其对后续震群序列的动态和静态应力触发作用.结果显示,龙陵第2主震受到了第1主震的动态和静态库仑破裂应力的触发作用.龙陵双主震的13个后续强余震中,发生在龙陵三角形块体内部的强余震,90%都受到了第1或第2主震的动态库仑破裂应力触发或静态库仑破裂应力触发作用,发生在三角形块体外部的强余震,2/3受到了第2主震的动态库仑破裂应力触发作用.从触发作用的强度和范围上看,第2主震的动态和静态库仑破裂应力触发作用都大于第1主震.就近场而言,受到龙陵双主震的动态和静态库仑破裂应力触发作用的余震数目相当,但动态库仑破裂应力的触发作用范围大于静态库仑破裂应力.
The complete Coulomb rupture stress induced by the Ms7.3 and Ms7.4 pairs of mainshocks in Longling, Yunnan Province in 1976 was calculated and studied, and their dynamic and static stress triggering on the sequence of subsequent swarm was also studied. The results show that the second main shock Which was triggered by the dynamic and static Coulomb rupture stress of the first mainshock.The strong aftershocks occurred inside the Longling Triangle block in 13 follow-up strong aftershocks of the Longling double mainshock, of which 90% were affected by the first or The dynamic Coulomb failure stress triggering or static Coulomb failure stress triggering of the second mainshock, the strong aftershock occurring outside the triangular block, and the second third of the earthquakes triggering the dynamic Coulomb rupture stress of the second mainshock are shown in Fig. In terms of range and scope, the dynamic and static Coulomb failure stress triggering of the second main shock is greater than that of the first main shock In terms of the near field, the number of aftershocks triggered by the dynamic and static Coulomb failure stresses of the two main shocks in Longling is quite similar, However, the dynamic range of Coulomb failure stress is greater than the static Coulomb failure stress.