摘要
总结了1989年侯马4.9Ms地震的地震学前兆。结果表明震前1～2年至几年200km内b值、小震频度出现下降,震中区小震条带出现空段,集中度下降。缺震曲线和分数维值也出现异常。在此基础上讨论了该次地震的发生过程及该区今后的趋势。
This is a summary of the seismologic precursor of the earthquake of mag. 4.9 occurred in Houma area in 1989, which shows tha decrease of the fa value within 200 km for the past 1-2 or even more years and the frequency of small quakes , the abnormality of spectral curve and fractional microvalue. It discusses the processes of the earthquake and the quake trend after it.
出处
《山西地震》
1991年第2期31-34,48,共4页
Earthquake Research in Shanxi
关键词
地震
前兆
侯马市
Houma seismology precursor
