天津地区地壳垂向形变(GPS)与文安地震  

WENAN EARTHQUAKE AND VERTICAL CRUSTAL DEFORMATION (WITH GPS) IN TIANJIN AREA

作　　者：周海涛[1,2] 郭良迁[2] 薄万举[2] 胡新康[2] 

机构地区：[1]中国科学技术大学地球与空间科学学院,合肥230026 [2]中国地震局第一监测中心,天津300180

出　　处：《大地测量与地球动力学》2010年第5期32-37,共6页Journal of Geodesy and Geodynamics

基　　金：天津市应用基础研究(08JCZDJC18900)

摘　　要：利用天津地区GPS局域网的观测资料,研究了天津地区地壳垂向形变及其与文安Ms5.1地震的关系。结果表明,在文安地震前,天津地区地壳上升从N向S扩展,到地震期间,全区以上升变化占主导,震后地壳下降由S向N发展。站点的时序变化曲线表明,天津南部的站点在文安地震前后出现了明显的异常,一般出现于震前数月至1年,震后恢复。The vertical crustal deformation in Tianjin and the relation between which and the Wenan Ms5.1 earthquake are researched by using the data of the GPS network in Tianjin. The results show that the uplift region had extended from north to south Tianjin area before the Wenan Ms5.1 earthquake, the change was dominant by rise in the whole region as the closing to earthquake and then the subsidence region had extended from south to north after the earthquake. The variation of the time sequence curve of the GPS sites shows that there is a obviously anomaly happened in southern part of Tianjin before and after the earthquake, lasting a period of several months or more than a year before the earthquake and resumed after the earthquake.

关 键 词：GPS 地壳垂向形变 文安地震 地震形变 天津地区 

分 类 号：P315.72[天文地球—地震学]