茅山地区垂直形变网的改造和监测能力

本文对茅山地区垂直形变网按照最优化原则进行的改造工作进行了论证,并探讨了如何提取地形变信息的问题。

THE IMPROVEMENT OF THE VERTICAL DYNAMIC GEODESY NETWORK IN MAOSHAN AREA AND THE DISCUSSION OF ITS ABILITIES FOR MONITORING EARTHQUAKE

The Maoshan area, especially the part in Liyang county, is characterized by the frequent earthquakes of medium to strong magnetades. We have improved the leveling net of the area, since the previous one was not able to meet the needs of seismic leveling survey. This paper expounds the effect of this improvement by calculation, proves the stronger monitoring ability of the new net, and discusses the whole process for obtaining the data of crustal deformation: "observing-interval-change in beach mark positions-crustal deformation". We have drawn the profile of vertical crustal deformation based on the leveling data since 1979 from the "Tianwangshi-Hugiao" measuring line. It tutus out that the deformation is obviously correlated with the Lishui earthquake (M=3.2) in April 1984. This provides the possibilities for obtaining the crustal deformation data as indications of earthquake.