震前深井电磁短临前兆信息的观测和研究  

DEEP-WELLOBSE RVATIONA NDRESEARCHONPRESEISMIC SHORT-IMPENDINGELECTROMAGNETICPRECURSOR

作　　者：陈立德[1] 包德修[1] 邹永菊 张雄[1] 和宏伟[1] 

机构地区：[1]云南省地震局,云南大学

出　　处：《西北地震学报》1994年第2期36-44,共9页Northwestern Seismological Journal

基　　金：地震科学联合基金

摘　　要：本文应用大量震例研究了地震前深井电磁波短临前兆信息。研究结果表明，在１．９和２７ｋＨｚ信道上，地震前２－４个月和１０－６Ｏ天，可观测到短临型、短期型和临震型三种电磁波信号。电磁信号增强时段与孕震区小震频度增强同步，表明这些信号可能与孕震区微破裂有关。本文还利用信息包源偶全体模型定量计算了组成变化的电磁场的准静场、感应场、辐射场随观测距离及方位的变化，据此对观测结果进行了初步解释。Through the observation and research of deep-well short-term and imminent electromag-netic information(E1)using whip- liked antenna,it is stated that:in time period 1 0 days to 4months before an earthquake,three types of seismo- precursory signals such as short-immi-nent,short-term and imminent can be detected on l.9kHz and 2 7kHz underground signalchannel.The fact that the increasing and decreasing period of E1 is correspond to that of smallearthquake frequency in seismogenic zone stated that there may exist some relations betweenthe excitation of E 1 and the mini fracture development in seismogenic zone,The dipolecharged body model(DCBM)proposed by us points out:the changing electromagnetic field iscomposed by three types of field such as qusi-static field,inductive field,and radiative field. Some quantitative results of these three type fields changing with observation distance and di-rection are given in this paper.

关 键 词：地震前兆 深井 电磁波观测 

分 类 号：P315.7[天文地球—地震学]