唐山及大同－阳高地震大地形变与重力前兆综合研究

本大概还了近年来利用大地形变及重力复测资料研究唐山及大同－阳高地震的丰富成果，对这２次地震震前大地形变及重力前兆综合研究认为：震中区震前呈现闭锁状态；断层蠕滑及深部物质的运移，是震前的显著标志；地震成因的组合模式可以较好地解释唐山及大同一阳高地震的机制；跟踪监测形变场、重力场及断层活动时空演化特性，是利用大地形变及重力测量手段进行地震预测的基本出发点。

A Comprehensive Research on the Precursory Geodetic Deformation and Gravity Variation of Tangshan and Datong-Yanggao Earthquakes

In this paper the author generally stated the pentiful recent achievements of research on the Tangshanand the Datong-Yanggao earthquakes by means of geodetic and gravity repetition data.On the basis of thecomprehensive research on the tectonic deformation and the gravity prescursor before two earthquakes,it isthought that:Epicenter zones were in a locked state;the fault creep and the mirgration of deep materials werethe obvious signs before the shocks;the combination model of seimogenesis can better explain the mechanismsof the Tangshan and the Datong earthquakes. Keeping close monitoring of time and space evolution character-istics of deformation field,gravity fields and fauIting is the fundamental strarting point of earthquake predic-tion by means of geodetic deformation monitoring and gravity measurment.