摘要
首先指出了天山、阴山构造带新生代以前在成因上是共同的,新生代以来东西两段差异活动虽然明显,但仍有一定的共性.文中着重分析了不被人们重视的北纬41度震情带西段地震和日本地区浅源大震相关概率为百分之九十,对应程度百分之九十一.可以对震级阈值以上地震按百分之九十的把握进行九个月左右的相互预报.日本地区北纬40度以南中深源地震后约一年,北纬41度震情带东段均有地震对应.这无疑对判断阴山燕山带震情有一定予警作用.为了更好地掌握北纬41度震情带地震活动特征,文中又对其东西两段进行了分析,发现二者交替活动,其表现对判断该带震情是有益的.最后,对目前该带震情趋势以及地震相关原因进行了初步探讨.
Firstly, the paper points out that Tianshan and Yinshan tectonic belts are same on cause of for mation before the Cenozoic era. Although the difference activity between the eastern zone and the western is obvious after the Era, the generality is still in exisence on cartain level. For a mid or deep focus earthquake located at southern area of 40° N in Japan to occur and for one year to pass, in general, there will be some corresponding earthquakes on eastern segment of seismic belt of 41°N. therefore, it is beneficial to judging earthquake risk trend, finally, We. discuss present tendency of the seismic belt of 41°N.
出处
《防灾减灾学报》
1989年第2期67-73,共7页
Journal of Disaster Prevention And Reduction
