摘要
根据“比较科学学”的对比研究方法,对1975—1976年全球地震和中国地震活动,与最近两年全球地震活动作了对比,并分析了1900—1990年全球范围和中国大陆地震活动的特点。 据资料分析,全球性地震活动随时间分布具有高潮期和低潮期。最强烈活动期为1940—1950年左右,Ms≥7级地震年频次为25—40次;相对活动最低潮期为1980—1988年,Ms≥7级地震年颁次只有5—12次。我国境内地震活动也有高潮和低潮活动期,目前,我国大陆处于一个新的地震活动高潮期。 1980—1988年是全球性8级地震较少时段,可能是地震能量积累过程。1990年全球地震活动的突然增强,仅半年时间内发生12次Ms≥7级地震,其中菲律宾发生8级地震,震情与1975—1976年情况相类似。 本文在对比活动图象基础上,估计了全球和中国大陆今后几年中的强震活动趋势。
Based on the comparative method of "Comparative Science",the author made a comparison of the seismic activities in the globe and China during 1975 -1976 with the activities in recent two years,and meanwhile analysed the seismicity pattern for 1900-1990.According to the characteristics of the global seismicities.it is found out that the most active period appeared in 1940-1950,with annual frequency of Ms≥7. 0 earthquakes 25 - 40 times,where in the relative quiet period,only 5-12 times of Ms≥7. 0 earthquakes took place. The seismicity in China also showed the same pattern, now we are in face of the new circle of the seismic active period.The period of 1980-1988 was the relative low period of seismicity, for its lack of 8. 0 great earthquakes,which we could call it the accumulative process of seismic energy. But in 1990,things changed very much, there were twelve Ms≥7. 0 occurred within six months, where the Philippines 8. 0 great shock proved the same pattern of 1975-1976.With the comparison of the seismic patterns, the author evaluated the active tendency of the strong shocks in the globe and China for the years to come.
出处
《内陆地震》
1991年第3期193-201,共9页
Inland Earthquake
关键词
地震活动性
地震图象
比较研究
The whole globe and Chinese seimic active pattern Comparative analysis Trend analysis
