【摘要】 2006年7月4日河北省文安县发生了ML5.5级地震,震前震中西南200km的石家庄马村站自512井水汞3月15日~5月15日出现了短期高值异常,6月3日出现了高值突跳异常。本文分析研究了文安地震前水汞的异常变化,以及1999年水汞观测以来的异常变化特征。分析认为,震前小马村水汞的异常变化幅度较大,异常特征明显,前兆意义显著。更多还原

【Abstract】 A M5.1 earthquake occurred at Wen’an of Hebei Province on July 4 of 2006.The water mercury from Zi-512 well in Macun Station of Shijiazhuang,200km southwest from the epicenter,showed a high value anomaly from March 15 to May 15 and a low value anomaly on June 3 before the event.The characteristic of the anomalies is studied here.As its large magnitude and clear characteristic,the anomalies have great significance of precursor.更多还原