安徽中西部地区地震学异常研究

试图通过分析安徽中西部地区 1970年以来出现的 16次群体性地震学异常,寻找“有异常无地震”的力源。研究结果表明“有异常无地震”的现象与华东及附近海域的中强震具有一定的相 关性,当该区发生 M L≥ 5. 0以上地震时, 安徽中西部地区出现群体性地震学异常。这一现象表明,安徽中西部地区是华东及附近海域不均匀应力场发展演化过程中的一个应力集中点,也是地震学异常的敏感区,深入研究它与震中区地震活动之间的关系,对识别未来强震发生的信息, 无疑是重要的。

Research of seismological anomaly truthfulness in Anhui Province

In this paper, six teen groups of seismological anomaly in Anhui province since 1970 have been analyzed. The authors try to find the force source of that“ there is an anomaly but no earthquake occurs”. Correlation is found between the situation that “there is an anomaly but no earthquake occurs” and moderately strong earthquakes in Xiayangzi fault. There would have groups of seismological anomaly in middle-western Anhui province when earthquake with ML≥ 5. 0 occurred in tectonic system of Xiayangzi fault. This phenomenon may indicate that the middle-western Anhui province is a strain-concentrated point during the development of the inhomogeneous strain field in East China, and also is a sensitive region of seismological anomaly. It is important to study the relation between anomaly and epicentral region in judging information about the coming strong earthquake.