山东地区水化学短临跟踪标志体系的研究

Study on Hydrochemical Short-Impending Tracing Index System in Shandong Region

在系统整理山东地区水化学观测资料的基础上 ,对山东菏泽 5 9级地震、苍山 5 2级地震及大同 6 1级地震和南黄海 5 3级地震前的地震异常特征进行了分析和总结 ,认为水化学多组分的同步异常变化 ,反映了震源应力场孕育过程 ,具有统一的物理力学机制 ,是震前源兆异常的重要标志。这些异常基本同步出现 ,相互印证 ,增强了异常的可信度 ,为短临异常的判定提供了较为充分的依据。某一井孔水化学多组分出现同步异常变化 ,预示位于井孔同一活动断裂上未来十几天至几个月有可能发生 5级以上地震。

Based on systematizing the hydrochemical observation data from Shandong region, seismological anomalous features before the M5 9 Heze earthquake and the Cangshan M5 2 earthquake in Shandong, the M6 1 Datong earthquake and the M5 3 south Yellow Sea earthquake are analyzed and summarized. It is thought that synchronous variation in the anomalies of multiple hydrochemical components reflects seismogenic process of focal stress field, has unified physical and mechanical mechanism and is an important index for source precursor anomalies before earthquakes. The anomalies appeared synchromously on the whole, confirming each other, which strengthened confidence in the anomalies and provided relatively full basis for judging short-impending anomalies. Synchronous variation in the anomalies of multiple hydrochemical componets in some well means that a earthquake with M5 0 or more will occur probably in same active fault where the well is located in future more than ten days to several months.