山西大同——阳高5.6级地震离石台地倾斜异常特征分析

1999年 11月 1日 ,在山西大同—阳高一带发生了 Ms5 .6地震。山西离石地震台依据该台地倾斜观测出现的异常 ,震前对这次地震作了较好的短临地震预报 ,为了探讨单台地震预报的方法 ,在该次短临预报的基础上 ,进一步用差分法、滤波法、矢量法、形态分析法对观测资料作了进一步的处理 ,发现该台地倾斜震前异常反映较好 ,具有明显的阶段性特征。指出 ,这对山西的地震监测预报有重要的作用。

Analysis of Ground Tilt Anomaly Characteristic for Datong-Yanggao Earthquake of Ms5.6 in Shanxi

On Nov.,11,1999,an earthquake of Ms5.6 stroke Datong Yanggao,Shanxi. Based on the ground tilt anomalies occurred in Lishi Central Seismological Observatory before the shock, a short term prediction for this earthquake was well made. After further processing the tilt data of Lishi Seismological Observatory of Shanxi, by using calculus of differences, filtering, vector and morphologic analysis, it is found that the ground tilt anomalies of the observatory usually appear before earthquake and show obviously stage characteristics. It has important significance for earthquake monitoring and prediction in Shanxi.