澜沧-耿马等强震迁移活动与地电前兆场时空关系  

SPACIO-TEMPORAL CORRELATION BETWEEN THE ACTIVITY OF STRONG EARTHQUAKE MIGRATION AND THE GEOELECTRC PRECURSORY FIELD OF LANCANG-GENGMA EARTHQUAKE

作　　者：李晓玲[1] 汪志亮[1] 余素荣[1] 

机构地区：[1]国家地震局分析预报中心,中国北京100036

出　　处：《地震》1996年第3期296-302,共7页Earthquake

摘　　要：研究1988年11月至1990年10月近2a时间内,在22°～36°N,98°～104°E地区连发性的5次6级以上迁移地震与地电前兆的时空关系。结果表明,这组连发性迁移强震发生之前,地电前兆在南北两地区观测到两个应力相对集中区。随着南部系统内应力不断向北调整,发生了多次强震。这组连发性的强震孕育,包括它们各自前兆场分布和发育,彼此并不是孤立的,而是彼此呼应的。It is studied that spacio- temoral correlation between the geoelectric precursory field and five continuously occurred earthquakes with Ms≥6 in the region of 22?- 46?N, 98?-104?E from Nov. 1988 to Oct. 1990. The results show that there are two regions, where the geoelectrical precursors are relatively concentrated in the southern and orthern areas before those strong shocks migrated continuosly; owing to the successive stress adjustment northward in southern system, many strong shocks occurred. The distribution and development of precursory field as well as the preparations of a series of strons earthauakes are not isolated but concordant.

关 键 词：地震活动迁移 地震前兆 地电前兆场 迁移速度 

分 类 号：P315.7[天文地球—地震学] P315.5[天文地球—固体地球物理学]