节点文献
昆仑山口西8.1级地震前的地震活动图像演变特征
EVOLUTION CHARACTERISTICS OF SEISMICITY PATTERN BEFORE WEST TO KUNLUN MOUNTAIN PASS M_S8.1 EARTHQUAKE
【摘要】 昆仑山口西8.1级地震的孕育过程以地震空间图像的递进演变为特征,可分为三个阶段:1959年以来M≥6地震围成背景空区的阶段,1994年以来M≥5地震围成孕震空区的阶段和震前4个月的"逼近地震空区"阶段.在孕震空区的末期,青藏块体及中国西部出现了1~2年的地震条带;伴随逼近地震空区的形成,还出现了较大范围的小震平静.最后讨论了中国大陆西部8级地震的时空演变特征.
【Abstract】 Seismogenic process of west to Kunlun Mountain Pass MS8.1 earthquake is consists of three evolutionary stages for seismicity pattern.The first stage is background gap formed by MS≥6 earthquake from 1959;the second stage is pregnant gap formed by MS≥5 earthquakes from in 1994, and the third stage,"imminent earthquake gap" lasts 4 months before the MS8.1 earthquake.At the later period of the pregnant gap,seismic bands in 1~2 years appeared in Qinghai-Xizang block and western China. Along with the formation of the "imminent earthquake gap", no small earthquake occurred in the region.The timespace evolutionary feature of MS8 earthquakes in western China is discussed at the end.
【Key words】 Seismicity pattern; Seismic gap; Seismic band; West to Kunlun Mountain Pass M_S8.1 earthquake;
- 【文献出处】 西北地震学报 ,Northwestern Seismological Journal , 编辑部邮箱 ,2003年01期
- 【分类号】P315.5
- 【被引频次】7
- 【下载频次】29