龚正,许才军

• 1:武汉大学测绘学院

摘要(Abstract)：

针对2011年日本东北大地震(Tohoku-Oki地震)发生前后较短时间内的多次较大前震和余震和主震混在一起,不利于提取出主震同震信号的问题,该文利用弹性位错理论模拟计算了Tohoku-Oki地震一次较大前震和两次较大余震的同震重力变化,讨论了这3次地震单独和综合的重力效应,并与主震重力变化对比分析,认为这3次前震和余震引起的重力变化数值较大,影响范围广,会直接影响到Tohoku-Oki地震主震的同震重力信号提取,所以需要作为重要误差考虑。

关键词(KeyWords)： 同震重力变化;弹性位错理论;日本东北大地震;前震;余震

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金重点项目(41431069);; 国家973项目(2013CB733304);; 地球空间环境与大地测量教育部重点实验室测绘基础研究基金项目(13-02-08)

作者(Author): 龚正,许才军

DOI: 10.16251/j.cnki.1009-2307.2015.12.013

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