【摘要】 总结分析了2003年10月25日发生在甘肃山丹-民乐6 1级、5 8级地震的异常特征,总体表现为:(1)地震活动在空间上的丛集和地震活动水平的明显增强现象,以及一些显著地震事件的发生和有序迁移;(2)震源区外前兆异常出现大幅度同步变化的短期异常特征。更多还原

【Abstract】 Anomaly characteristics of the earthquakes with M s6.1 and M s5.8 in Minle-Shandan area on Oct.25,2003 are analyzed.The results show that seismicity is abviously strengthened and clustered in space,and earthquakes are ordered migrated;the precursory anomalies out of the epicentral area are changed largely and synchronously in short period.更多还原