摘要
研究了河北张北等３次６级地震前后地电异常的变化及特征。结果表明，６级地震的地电前兆能显示出０．５ａ左右的趋势异常变化，但台项少，强度弱，分布零散，远不及７级强震前的异常显著。发现个别地震前地电正常年变化形态发生了明显变化，完全破坏了原年变规律，出现了可辨认的异常变化。
The research results for the ground resistivity variation and its characters before and
after the 3 earthquakes with M6 0 at Zhangbei of Hebei showed that the earthquake precursors
of ground resistivity before M6 0 erthquake can show tendency anomalous variation about 0 5
a,it is not as good as the M7 0 strong earthquake.The results showed that the annual variation
shape of the ground resistivity before individual earthquake changed obviously,it left the
original annual variation law,the distinguishable anomalous variation occurred.The author
suggested that the exact mediumstrong earthquake pridiction by the ground resistivity method
is difficult to make at present.
出处
《山西地震》
1999年第2期42-45,共4页
Earthquake Research in Shanxi
