【摘要】 通过对邕宁4.5级地震发生的地质背景、烈度分布、地震序列、震源机制及前兆异常等分析,发现在震前1年半,小震活动明显增强,空间分布上3级地震逐渐向4.5级地震逼近。根据前兆异常的分析,认为小震活动时间扫描异常增强具有一定的同步性,对判断未来中强震的震中具有一定的指导意义。更多还原

【Abstract】 Based on the analysis of the geological background, the intensity distribution, earthquake sequence,focal mechanism and precursory anomaly of Yongning M4.5 earthquake, the paper found that earthquake activity increased one and a half years before the earthquake, and M3 earthquakes approximated to the M 4.5 earthquake in spatial distribution. According to the analysis of seismicity anomaly, the author considers that the abnormal enhancement of small earthquakes activity before earthquake has certain guiding significance for earthquake prediction.更多还原