河北昌黎地震台地电阻率异常分析
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摘要
河北昌黎台地电阻率EW测道2017年6—8月出现快速下降变化,经检测,观测系统工作正常。通过环境调研和辅助资料对比分析,发现该变化与降雨和粉丝厂干扰有一定关系。采用褶积滤波法去掉降雨干扰,EW测道地电阻率仍为下降趋势,说明该下降变化不能完全用降雨来解释,不排除是地震前异常变化的可能。
The rapid decline change of resistivity from Changli Seismic Station in EW direction is detected since 6-8, 2017. It has been found that the observation system working properly. Through environmental research and comparative analysis of auxiliary data, it was found that this change has a certain relationship with rainfall and fan factory disturbance. But the decline trend of EW channel is still exist after removing the effects of rain by convolution filtering method. This shows that the decline change could not be explained by rainfall completely. and also could not exclude the abnormal change before some earthquake.
The rapid decline change of resistivity from Changli Seismic Station in EW direction is detected since 6-8, 2017. It has been found that the observation system working properly. Through environmental research and comparative analysis of auxiliary data, it was found that this change has a certain relationship with rainfall and fan factory disturbance. But the decline trend of EW channel is still exist after removing the effects of rain by convolution filtering method. This shows that the decline change could not be explained by rainfall completely. and also could not exclude the abnormal change before some earthquake.
引文
杜学彬.在地震预报中的两类视电阻率变化[J].中国科学:地球科学,2010,40(10):1 321-1 330.
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王志贤,彭远黔,张学民.地电阻率异常变化与地震成组活动关系的研究[J].华北地震科学,1996,14(1):19-26.
解滔,卢军.地电阻率三维影响系数及其应用[J].地震地质,2015,37(4):1 125-1 135.
张国苓,乔子云,贾立峰,等.河北昌黎地电阻率频谱特征分析[J].地震地磁观测与研究,2016,37(1):57-62.
张学民,王志贤,臧明珍,等.降雨对地电阻率干扰的分析[J].华北地震科学,1996,14(4):71-75.
张学民.地电阻率的年变畸变异常分析[J].地震地磁观测与研究,2004,25(2):68-74.
张学民,李美,关华平.汶川8.0级地震前的地电阻率异常分析[J].地震,2009,29(1):108-115.
赵玉林,钱复业.唐山7.8级强震前震中周围形变电阻率的下降异常[J].地球物理学报,1978,21(3):181-190.
赵玉林,卢军,张洪魁,等.电测量在中国地震预报中的应用[J].地震地质,2001,23(2):277-285.
Lu J,Qian F Y,Zhao Y L.Sensitivity analysis of the Schlumberger monitoring array:Application to changes of resistivity prior to the 1976 earthquake in Tangshan,China[J].Tectonophysics,1999,307(3):397-405.
Zhang J G,Wu X P,Yang X D,et al.Observational evidence of anisotropic changes of apparent resistivity before strong earthquakes[J].Geophys J Int,2017,210(3):1 323-1 331.
钱复业,赵玉林.地震前地电阻率变化十例[J].地震学报,1980,2(2):186-197.
钱复业,赵玉林,于谋明,等.地震前地电阻率的异常变化[J].中国科学B辑,1982,(9):831-839.
钱家栋,曹爱民.1976年唐山7.8级地震地电阻率和地下水前兆综合物理机制研究[J].地震,1998,18(Z1):1-9.
宋晓磊,黄清华.降水渗透过程分析及其对视电阻率的影响[J].北京大学学报(自然科学版),2006,42(4):470-477.
王志贤,彭远黔,张学民.地电阻率异常变化与地震成组活动关系的研究[J].华北地震科学,1996,14(1):19-26.
解滔,卢军.地电阻率三维影响系数及其应用[J].地震地质,2015,37(4):1 125-1 135.
张国苓,乔子云,贾立峰,等.河北昌黎地电阻率频谱特征分析[J].地震地磁观测与研究,2016,37(1):57-62.
张学民,王志贤,臧明珍,等.降雨对地电阻率干扰的分析[J].华北地震科学,1996,14(4):71-75.
张学民.地电阻率的年变畸变异常分析[J].地震地磁观测与研究,2004,25(2):68-74.
张学民,李美,关华平.汶川8.0级地震前的地电阻率异常分析[J].地震,2009,29(1):108-115.
赵玉林,钱复业.唐山7.8级强震前震中周围形变电阻率的下降异常[J].地球物理学报,1978,21(3):181-190.
赵玉林,卢军,张洪魁,等.电测量在中国地震预报中的应用[J].地震地质,2001,23(2):277-285.
Lu J,Qian F Y,Zhao Y L.Sensitivity analysis of the Schlumberger monitoring array:Application to changes of resistivity prior to the 1976 earthquake in Tangshan,China[J].Tectonophysics,1999,307(3):397-405.
Zhang J G,Wu X P,Yang X D,et al.Observational evidence of anisotropic changes of apparent resistivity before strong earthquakes[J].Geophys J Int,2017,210(3):1 323-1 331.