欢迎访问《地震》,

地震 ›› 2017, Vol. 37 ›› Issue (2): 167-178.

• • 上一篇    

安徽省数字化地电阻率观测数据的干扰分析与处理方法

刘川琴1,金艳2,裴红云2,李军辉2   

  1. 1.安徽省合肥地震台, 安徽 合肥 230031;
    2.安徽省地震局, 安徽 合肥 230031
  • 收稿日期:2016-08-02 出版日期:2017-04-20 发布日期:2019-08-14
  • 作者简介:刘川琴(1981-), 女, 安徽肥西人, 硕士, 工程师, 主要从事前兆监测工作。
  • 基金资助:
    安徽省青年基金项目(20160613)资助

Interference Factors and Processing of Digital Geoelectrical Resistivity Data in Anhui Province

LIU Chuan-qin1,JIN Yan2,PEI Hong-yun2,LI Jun-hui2   

  1. 1.Hefei Seismic Station of Anhui, Hefei 230031, China;
    2.Earthquake Administration of Anhui, Hefei 230031, China
  • Received:2016-08-02 Online:2017-04-20 Published:2019-08-14

摘要: 近年来安徽地区地电阻率观测多次出现异常数据, 同期间省内发生了多次MS3.0以上地震, 我们对安徽省观测较好的几个台站数据进行年变化特征、 干扰因素的分析, 发现水位、 降雨是影响地电阻率数据变化的主要因素, 通过以月为窗长的回归拟合分析进行水位的干扰消除, 计算的残差值能有效地消除地电阻率年变化干扰, 运用消除干扰后的曲线对近期发生的地震进行分析, 发现霍山MS4.3和阜阳MS4.3等地震前未出现明显趋势性前兆异常, 临近台站出现的异常变化可能与该区域的地下水位干扰性变化有关。

关键词: 地电阻率观测, 干扰特征, 水位变化, 安徽地区

Abstract: In recent years, many abnormal geoelectrical resistivity data appeared in seismic stations, while magnitude MS≥3.0 earthquakes have occurred many times in Anhui province. We analyzed annual change characteristics and interference factors of geoelectrical resistivity data in many high quality stations, and found that water level and the rainfall were the main factors influencing geoelectrical resistivity data changes. Furthermore, we had the interference analysis for water level through calculating regression fitting for the window length of a month, so that the calculated residuals can effectively eliminate annual change characteristics, and get the curve to analyze recent earthquakes. Finally, we found that there have no obvious abnormal images before the Huoshan and Fuyang 4.3 earthquakes.

Key words: Geoelectric resistivity, Interference characteristics, Water level, Anhui province

中图分类号: