山西洪洞M_L5.0地震前后临潼台流体异常特征

Anomaly Characteristics of Underground Fluids at Lintong Seismological Station before and after the Hongtong,Shanxi,Earthquake of M_L5.0

采用滤波、拟合、去周期、五日均值等方法,对临潼台水氡、水温、水溶气资料进行了分析处理,得到以下认识:用提取异常方法对原始曲线进行处理后,地震前兆异常更加明显与突出,这些异常均属于短期和临震前兆异常;临潼台流体对2003年山西洪洞ML5.0地震有明显反映,其原因一方面由于此次地震距临潼台较近,另一方面也反映了临潼台所处构造位置比较特殊,位于映震的灵敏位置。

Water radon, water temperature and water-dissolved gas data of Lintong Seismological Station have been processed and analyzed the means of digital filtering, fitting, period removing and average 5-day value etc. The conclusions have been made as followings： Precursory anomalies are more obvious and prominent, which all belong to anomalies of short term and imminent term, after anomalies are distilled from the raw data; Fluid of Lintong Seismological Station has obvious response to the Hongtong earthquake of ML5.0, one cause is that the earthquake is near to Lintong Seismological Station, and another is that Lintong Seismological Station lies on special geological structure sensitive to the the earthquakes.