张风霜,郭良迁

• 1:中国地震局第一监测中心

摘要(Abstract)：

针对渤海周边地区及营口-潍坊断裂带,收集并统一处理该地区1999年以来的GPS数据,依据最新的观测成果跟踪该区域地壳运动的动态变化;采用块体运动方程计算营口-潍坊断裂带的活动速率,并分析该断裂带的活动性质。结果表明,1999-2010年营口-潍坊断裂带为右旋,2011-2013年为左旋,日本3·11地震使北北东向营口-潍坊断裂带改变了走滑活动性质,反映了3·11地震使华北东部区域应力场有明显地变化,也表明华北地区的构造活动受印度-欧亚碰撞带和太平洋-欧亚板块俯冲带的活动程度制约。日本3·11大地震使本区拉张显著,应变能有一定卸载性变化。本文的研究结果对于理解营潍断裂带地震活动性与规律及区域动力学状况具有一定的参考价值。

关键词(KeyWords)： 渤海地区位移场;营潍断裂带现代活动;断裂带走滑演变;日本3·11地震影响

Abstract:

Keywords:

基金项目(Foundation): 科技基础性工作专项重点项目(2015FY210400);; 国家自然科学基金项目(41472180);; 2015年度震情跟踪定向工作任务(2015020202)

作者(Author): 张风霜,郭良迁

DOI: 10.16251/j.cnki.1009-2307.2017.09.010

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