【摘要】 对2002年以来的静海地震台、宝坻地震台的大地电场连续观测资料,使用地电场观测的同一测向长、短极距测值的比值法进行分析处理,计算结果显示,2006年7月4日文安ML5.5地震前大地电场观测存在明显的地震前兆,但从同期的地电场原始观测资料中无法识别出该项异常信息。研究结果表明,同一测向长、短极距测值的比值法是一种从电场观测资料中有效识别和提取地震前兆信息的方法。更多还原

【Abstract】 Through analyzing and processing the continuous observation data of the telluric electric field at Jinghai and Baodi stations which close to the epicenter of Wen′an earthquake of ML5.5 on July 4,2006 since 2002,preliminary results show there are anomaly in telluric electric field before the Wen′an earthquake.It is indicated that multi-polar with short distance observation may be an effective approach to identify Geo-electric anomaly before earthquakes.更多还原