青海及邻区中强地震序列类型及特征研究  

A STUDY ON TYPE AND CHARACTERISTIC OF MID STRONG SEISMIC SEQUENCES IN QINGHAI PROVINCE AND ITS VICINITY

作　　者：陈玉华[1] 马文静[1] 张瑞斌[1] 

机构地区：[1]青海省地震局,青海西宁810001

出　　处：《西北地震学报》2001年第3期250-256,共7页Northwestern Seismological Journal

基　　金：青海省地震局地震科学基金资助课题 ( 99 0 0 2 )

摘　　要：系统地整理和分析了 1 970～ 1 999年发生在青海及邻近地区的 6 5次MS ≥ 5.0地震序列 .这些地震序列可分为孤立型、主震 余震型、前震 主震 余震型和多震型4种 ,以孤立型为主 .其中有 1 8次MS ≥ 6 .0地震序列以主震 余震型为主 .这些地震序列分布于 4个地震构造带内 .每个地震带内地震的频度、强度及序列类型不同 .计算分析了地震序列早期特征参数的变化特征 。Sequences of 65 M S≥5 earthquakes from 1970 to 1999 in Qinghai province and its vicinity are analyzed and studied.These sequences can be divided into isolated type,mainshock aftershock type,foreshock mainshock aftershock type and multishock type,in which isolated type is the most.There are 18 M S≥6.0 sequences in which mainshock aftershock type is the most in the 65 sequences.The sequences are distributed in Qilian,Chaidamu,Kekexili and Wulanwulahu seismic belts.Earthquake frequency,strength and sequence type in the four seismic belts are analyzed. Characteristic parameters of early days of the seismic sequences are calculated . The results show that b and u values are useful in early discrimination of seismic sequence type.

关 键 词：青海 地震活动特征 地震序列类型 早期判断 空间分布 频度 

分 类 号：P315.5[天文地球—地震学]