摘要
针对地震系统各区域重力网的现状，提出了一种在没有绝对重力测量资料的情况下，利用网区多年积累的观测资料，建立区域重力场相对基准的方法。实验证明，采用该方法建立的区域重力场相对基准，精度优于５０ｎｍ·ｓ－２，不仅有利于地震重力前兆信息的提取，而且能优化和评定区域重力网的质量，标定和检测重力仪参数及其变化。
It is necessary to establish a datum for studying the changes of regional gravitational field. Based on the present condition of the regional gravitational networks in seismological system, a method for establishing a relative datum is put forward for regional gravitational field with the observational data collected in net area for many years, except absolute gravity measurement data. The experiment proves that the precision of the relative datum established by this method is better than 50 nm·s -2 . It is not only beneficial to extract the seismic gravity precursor information, but also can optimize and evaluate the quality of regional gravitational network, and calibrate and detect the parameters of gravimeters and their variations.
出处
《地壳形变与地震》
CSCD
1999年第1期78-81,共4页
Crustal Deformation and Earthquake
基金
地震科学联合基金
关键词
区域重力场
相对基准
重力网质量
地震前兆
regional gravitational field, relative datum, quality of gravitational network
