【摘要】 分析研究了 1 983年菏泽 5 .9级和 1 995年苍山 5 .2级地震中短期地震前兆的时空演化特征 ,总结了这两次地震前兆时空演化特征的共性和个性 ,探讨了前兆异常分布与构造的关系、场源兆与构造应力场的关系、异常的空间分布与发震地点的确定和异常的时间分布与发震时间的确定等科学问题 .更多还原

【Abstract】 Time space evolution characteristics of medium term and short term precursors of the Heze M S5.9 and Cangshan M S5.2 earthquakes are analyzed and studied,and the generalities and individualities of the evolution characteristics are summarized.The scientific problems such as relation between seismic precursors and structures,relation between precursors from seismic source and tectonic stress field,relation between spatial distribution of anomalies and determination of site where earthquake will occur,relation btween temporal distribution of anomalies and determination of time when earthquake will occur,etc.are discussed.更多还原