2014年以来,琼中基准地震台连续重力观测数据出现较为显著的零漂转折加速和数据放大异常。经仪器观测系统检查、台站观测环境调查、数据分析等核实操作,分析认为:①零漂转折加速异常系观测环境影响所致;②数据放大异常系网络数据采集器故障所致。因此,2次异常均非地震地球物理异常。此类异常干扰判别可为其他重力台站观测数据分析提供参考。
Since 2014, the continuous gravity observation data at Qiongzhong Seismic Station has been experiencing two significant abnormalities, one is zero-drift overturn acceleration anomaly, the other is data amplification anomaly. After checking the instrument observation system, investigating the observation environment of the station, and analyzing data, we considered that the first abnormality was caused by the observation environment. After analyzing the abnormally amplified data, we considered the second abnormality was caused by a network data collector failure. Therefore, these two anomalies were not earthquake precursor anomalies. Such anomalies may appear in the observation data of other gravity stations, so the reasons for these two kinds of anomalies have certain reference significance.
2020,41(2): 106-112 收稿日期:2019-03-08
DOI:10.3969/j.issn.1003-3246.2020.02.012
基金项目:中国地震局震情跟踪定向工作任务(项目编号:2019010202,2020010213);中国地震局监测、预报和科研三结合课题(项目编号:3JH-201901038)
作者简介:杨漾(1981-08-),男,高级工程师,主要从事地震观测仪器运行与维护工作。E-mail:jeason332@live.cn
*通讯作者:李盛(1986-11-),男,高级工程师,主要从事地震重力观测与地震活动性分析工作。E-mail:lishyiyuan@163.com
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