STUDY ON ABNORMAL CHARACTERISTICS OF THE DIFFERENT STAGES BEFORE STRONG EARTHQUAKES IN THE SOUTHEASTERN REGION OF QINGHAI PROVINCE

In this paper,based on the basic characteristics of the tectonic background and regional earthquake activity in southeast region of Qinghai province,the precursory anomalies and seismic activities of long-term,medium-term,short-term and impending before strong earthquakes in southeastern region of Qinghai province are analyzed according to the data of《Earthquake Cases In China》,and the characteristics of regional seismic activity,the precursory data and the results are got in the paper.