节点文献
濮阳M_L4.6地震前泰安台形变异常特征分析
ON CHARACTERISTICS OF DEFORMATION ANOMALIES AT TAIAN STATION BEFORE PUYANG M_L4.6 EARTHQUAKE
【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。
【Abstract】 Some distinct short-term precursory anomalies were found in the level pendulum and vertical pendulum tiltmeter observations at Taian seismostation before the ML4.6 Puyang earthquake.The earthquake took place 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.
【Key words】 Puyang earthquake; Taian fiducial seismostation; short-impending anomaly; deformation observation; synthetic effect;
- 【文献出处】 大地测量与地球动力学 ,Journal of Geodesy and Geodynamics , 编辑部邮箱 ,2007年04期
- 【分类号】P315.72
- 【被引频次】14
- 【下载频次】67