河南及邻区地震的震源机制
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
汇编了河南及邻区 196 5~ 2 0 0 0年共 5 2次ML ≥ 3.5地震的震源机制 .分析表明 :震源机制两组节面的走向为北北东向和北西西向 ;P轴多为北东东向 ;T轴大都为北北西向 ;地震断层主要为走滑类型 .菏泽 5 .9级地震前P轴方向呈现出由紊乱到趋向一致的特征 .
The focal mechanisms of 52 M L≥3.5 earthquakes in Henan and its adjacent region from 1965 to 2000 are given. The results indicate that the strikes of the two nodal planes of these focal mechanisms are NNE and NWW repectively;most of the principal compressive stress axes P strike NEE and principal extensive stress axes T strike NNW;the seismo tectonics mainly are strike slip faults. The direction of P axes change from tumble into identity before moderate earthquakes.
引文
[1] 姚殿义,杜迎春,刘素英.华北地区的震源机制[J].华北地震科学,1991,9(3):37—48.
    [2] 华祥文.唐山强震前后北京、天津周围地区应力场变化过程[J].地震学报,1980,2(2):130—145.
    [3] 谢智,刘尧兴,王文旭,等.河淮地震带地震活动特征[J].地震学刊,2001,21(3):28—33.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心