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《Earthquake》 2001-01
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Stage-by-stage Characteristics of earthquake swarm activity in the North China region

SONG Zhi ping 1,XU Ping 1,XUE Yan 2 (1. Seismological Bureau of Beijing Municipality, Beijing 100080, China; 2.Center for Analysis and Prediction, CSB, Beijing 100036, China)  
In this paper, we studied the earthquake swarms from 1970 up to now in the North China region. It is shown that the migration and the stage by stage activity of earthquake swarms are obvious before Tangshan earthquake. The characteristics are preliminarily analyzed by using the theory of three dimensional rheological inclusion earthquake generating model. Predicted test of Zhangbei earthquake show that the migration and earthquake swarms should be applied to the medium tem prediction of strong earthquakes.
【Fund】: 地震科学联合基金会资助项目!(1980 85);; 北京市自然科学基金会资助项目!( 8992 0 0 8)
【CateGory Index】: P315.7
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