Analysis of Anomalies in the NE Component of the Extensometer at the Yixian Seismic Station
Since October 2022,a trend change has occurred in the NE component of the extensometer at Yixian Seismic Station,showing a tensile trend change,with a total change amplitude reaching 2.1×10-6.To clarify the cause of the abnormal change,an analysis and demonstration of factors such as observation data quality and environmental disturbances were conducted,and the strain effects of three disturbance sources on the extensometer were quantitatively calculated using different load models.Considering all factors,it is believed that the abnormal change in the NE component of the extensometer at Yixian Seismic Station is more likely to be a precursor anomaly,and it is necessary to strengthen the tracking and analysis of subsequent changes in this measurement.
万方数据
维普
