| 合肥台地电阻率NS向趋势异常变化原因分析 |
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| 引用本文： | 王燚坤,何康,李军辉,葛计划,陶媛.合肥台地电阻率NS向趋势异常变化原因分析[J].华南地震,2019,39(2):58-64. |
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| 作者姓名： | 王燚坤 何康 李军辉 葛计划 陶媛 |
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| 作者单位： | 合肥地震台, 合肥 34001;安徽省地震局, 合肥 34001 |
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| 摘 要： | 合肥台NS测向地电阻率自2015年以来出现趋势下降异常,经核实2015—2016年降雨量增多和地下水位抬升与地电阻率趋势下降异常变化显著相关。通过褶积滤波法和相关分析法分别消除降雨和水位影响后,趋势下降变化不明显,从而认为此变化为干扰所致,非地震前兆异常,并探讨了这种干扰影响机制,为今后判断引起地电测值变化的原因提供了科学依据。
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| 关 键 词： | 地电阻率 趋势异常 降雨、地下水位变化 褶积滤波 |
Cause Analysis on Abnormal Change of Ground Resistivity in NS Trend at Hefei Station |
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| WANG Yikun,HE Kang,LI Junhui,GE Jihua,TAO Yuan.Cause Analysis on Abnormal Change of Ground Resistivity in NS Trend at Hefei Station[J].South China Journal of Seismology,2019,39(2):58-64. |
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| Authors: | WANG Yikun HE Kang LI Junhui GE Jihua TAO Yuan |
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| Institution: | (Hefei Seismic Station,Hefei 230031,China;Anhui Earthquake Agency,Hefei 230031,China) |
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| Abstract: | Ground resistivity in NS trend at Hefei station has been declining anomalously since 2015.It is verified that the increase of rainfall and the rise of groundwater level are significantly correlated with the anomalous change of ground resistivity trend from 2015 to 2016.By using convolution filtering method and correlation analysis to eliminate the effect of rainfall and water level separately,the downward trend is almost unaffected.Therefore,it is considered that the change is caused by interference and is not an earthquake precursor anomaly.And the interference impact mechanism is discussed in purpose of providing a scientific basis for judging the causes of changes in geoelectric measurements in the future. |
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| Keywords: | Ground resistivity Anomalous trend Rainfall and groundwater level changes Convolution filtering |
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