摘要
通过对中国绝大部分地区 1970年以来有仪器测定震源深度的地震资料进行详细分析 ,提出了“地震地热说”的假说并对分析结果作出解释 ,得出了一个关于中国强震活动大形势的全新观念 ,认为中国强震活动受到地壳深部 4个“热点”(吉林、新疆兴都库什、台湾和西藏日喀则等中深源震区 ) 70年代强震活动的牵引 ,完成了一个由地震活动高潮期 ( 1970 ?～ 1982 )、调整期 ( 1983～ 1992 )和消减期 ( 1993～ 1999?)所组成的地震链全过程。目前消减期尚未结束 ,但从 1999年 4月 8日吉林7 0级深震开始 ,新的一轮地震链过程可能已在酝酿之中。
A detailed analysis is made for the earthquake data with focal depth since 1970 on the most regians of China. A hypothesis is poposed to explain the analysis results, which leads to a new concept on the overall situation of major earthquakes in China. It is suggested that major events of China are driven by the earthquakes with middle-depth ard deep-depth sources which occurred at four “hot spots” in 1970s, that are located at Jilin Province, Xindoukushi of Xinjiang, Taiwan, and Rikeze of Tibet. A process of earthquake chain composed of an active period (1970～1982), adjustment period (1983～1992) and waning period (1993～1999) has been completed. Althouth the last period is still under going, a new circle of the earthquake chain may be developing since the M 7.0 deep event of Jilin on April 8, 1999.
出处
《地震地质》
EI
CSCD
北大核心
2000年第4期360-370,共11页
Seismology and Geology
关键词
震源深度
强震活动
地震地热说
地震链
中国
Focal depth, Major earthquake, Hypothesis of seismo-geothermics, Hot spotd
