地震前地应力短临异常初探  

PRELIMINARY DISCUSSION ON CRUSTAL STRESS SHORT-IMMINENT ANOMALY BEFORE EARTHQUAKES

作　　者：张道仪[1] 延军[1] 张培耀[2] 孙国学[3] 徐玉荣[4] 

机构地区：[1]中国辐射防护研究院 [2]国家地震局地壳应力研究所 [3]山西省地震局 [4]福建省地震局莆田地震台

出　　处：《地震》1990年第1期43-49,共7页Earthquake

摘　　要：本文介绍了PYL-1型岩石应力仪观测到的地应力的几种异常变化,分析了这些异常与寻乌、泉州、花莲等地震的关系。应力短时间的大幅度连续变化或突发式跳跃摆动可能是短期前兆;而一、两次的应力突跳可能是临震前兆。莆田地震台曾据此对寻乌地震提前十天作出了初步预报。Several anomalous variations of crustal stress recorded by the PYL-1 rock stress-meter at some stations have been described and the relation between these anomalies and the earthquakes at Xunwu, Quanzhou and Hualian has been analyzed in this paper. Successive variations with large amplitude in a short time or sudden jump, or oscillation of the crustal stress are probably short-term precusors; and a few stress pulses might be impending signals for earthquakes. Based on this, a preliminary prediction was made by the Putian seismic station 10 days bafore the Xunwu earthquake.

关 键 词：地震前兆 地应力 短临异常 地震 

分 类 号：P315.7[天文地球—地震学]