摘要
易县地震台伸缩仪NE分量自2022年10月以来变化趋势发生转折,呈现张性趋势变化,总体变化幅度达2.1×10-6。为明确异常变化的原因,对观测数据质量和环境干扰等影响因素进行分析论证,利用不同的荷载模型定量计算3项干扰源对伸缩仪产生的应变影响。综合各项因素认为,易县地震台伸缩仪NE分量的异常变化为前兆异常的可能性较大,需要对该测项的后续变化加强跟踪分析。
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.
作者
屈曼
侯晓真
马栋
高晨
张娜
龚燕民
QU Man;HOU Xiaozhen;MA Dong;GAO Chen;ZHANG Na;GONG Yanmin(Hebei Earthquake Agency,Shijiazhuang,Hebei 050021,China;Baoding Seismic Monitoring Center Station,Hebei Earthquake Agency,Baoding,Hebei 071000,China)
出处
《山西地震》
2024年第1期33-37,共5页
Earthquake Research in Shanxi
关键词
潮汐因子
异常
伸缩仪
荷载模型
tidal factor
anomaly
extensometer
load model
