摘要
濮阳ML4.6地震前泰安台水平摆、垂直摆倾斜仪观测资料出现了显著的短、临前兆异常,地震发生在异常达最大值前后,且震中背向异常初期地壳的倾斜方向。根据泰安台与濮阳震中之间纵横交错的多条断层分析,泰安台倾斜仪出现的短、临前兆异常很可能反映了大区域应力场及相关的多条断层活动的综合效应,是"场兆"异常。
Some distinct short-term precursory anomalies were found in the level pendulum and vertical pendulum tihmeter observations at Taian seismostation before the M14.6 Puyang earthquake. The earthquake took piace when the anomalies reached the peak and their trend is in the opposite directions of the epicenter. Because of the existence of many crossing faults between Taian station and Puyang epicentral region,the short-impending anomaly from the tiltmeter at Taian station may be the synthetic effect from the dange of large regional stress field and related faults＇ movement,it is a＂field＂ anomaly.
出处
《大地测量与地球动力学》
CSCD
北大核心
2007年第4期100-104,共5页
Journal of Geodesy and Geodynamics
基金
2005年中国地震局三结合项目
2006年山东省地震局合同制项目
关键词
濮阳地震
泰安地震基准台
短、临异常
形变观测
综合效应
Puyang earthquake, Taian fiducial seismostation, short-impending anomaly, deformation observation, synthetic effect
