肇东水温观测数据低值异常分析

Analysis of low-value anomalies of water temperature observation data at Zhaodong Seismic Station

2022年1月28日肇东地震台观测井水温出现低值异常,在现场核实过程中,逐一排除观测系统、观测环境、气象因素、地源热泵系统等干扰因素的影响。引入1套相同型号的水温观测仪进行同层水温比对观测,并与同井水位测项数据变化进行对比,且选取观测井周边200 km范围内震例进行水温日均值映震异常分析,结果发现,水温数据异常具有发生不规律、数据变化幅度较大等特点,应为观测技术系统故障影响所致,分析认为此次水温数据异常主要由水温仪老化所致,非地震前兆异常。此次异常核实工作可为地震台站观测资料异常的现场核实提供参考依据。

On January 28,2022,an unusual low-value anomaly was observed in well water temperature at the Zhaodong Seismic Station.During the on-site verification,potential sources of interference,including the observation system,environmental factors,meteorological elements,and geothermal heat pump systems,were systematically ruled out.To address this anomaly,a set of water temperature sensors of the same model was introduced for comparative observations at the same depth,and their data variations were compared with concurrent water level measurements from the same well.Additionally,a daily average water temperature anomaly analysis was conducted within a 200 km radius around the observation well,using seismic events as a reference.The results indicated that the anomalous water temperature data exhibited irregular occurrences and significant data fluctuations,which is attributed primarily to a technical system malfunction rather than being indicative of pre-seismic anomalies.The analysis suggests that this particular water temperature anomaly was mainly due to sensor aging.This verification process serves as a reference basis for field verification of observational data anomalies at seismic monitoring stations.