【摘要】 2002年8月3日怀来县沙城发生ML4.4级地震,此次地震是首都圈地区发生的有较强震感的地震,虽然此次地震震级不大,但也是继昆仑山口8.1级地震以后,我国大陆东部地区上半年平静期内发生的一次比较显著的有感地震。本文主要介绍了该地震前怀来地震台地下流体测项水汞短临异常和地震预报尝试,同时展示了地下流体数字前兆观测三马坊气氡和怀4井数字气汞在震前的变化特征。更多还原

【Abstract】 Huailai ML4.4 earthquake that occurred on Aug.3,2002,is a relative strong event in Capital area recently.Though the magnitude is not large,but it is a marked and detectable earthquake in East China after the M8.1 earthquake occurred in west pass of Kunlun Mountain.The anomalies of water mercury recorded by Huailai Seismostation is studied in the paper,and the variation of Sanmafang gas radon as wellas gas mercury of Huailai No.4 well are also presented.更多还原