灯塔5.1级及通辽5.3级地震前兆异常特征

摘要

利用铁岭地震台数字水管倾斜仪、伸缩仪观测数据，对2013年1月23日灯塔5.1级地震和2013年4月22日通辽5.3级地震进行分析，发现两次地震前铁岭地震台前兆数据出现高频抖动、日变形态畸变，异常特征明显。%In this paper,combined with the water tube and the extensometer observation data of Tieling Seismic Station,the January 23,2013 Dengta MS 5.1 earthquake and April 22,2013,Tongliao MS 5.3 earthquake are analyzed comprehensively. According to the study,it is found that before the two earthquakes the data showed precursory anomalies. The trend anomaly of the water tube tiltmeter data and the extensometer data are as break the annua1 variation. The short-term anomaly of the water tube tiltmeter data appeared as high frequency jitter and shape distortion of the diurnal variation in the days before the two earthquakes.In addition,the abnormalities and the morphological characteristic before the earthquakes are obvious.