灾害学Issue(1)：56-62,7.DOI:10.3969/j.issn.1000-811X.2015.01.012
利用连续GPS资料分析芦山7.0级地震区域地壳变形特征
Analysis on Deformation Characteristics of the Regional Crust in Lushan M7.0 Earthquake by Continuous GPS Observation Data
摘要
Abstract
In April 20th,201 3,an earthquake attacked the region of Lushan,Sichuan province in the south-ern Longmen mountains fault zone,and caused serious earthquake disaster and secondary hazards.In order to re-search the seismic crustal deformation characteristics,GPS continuous data in 201 0 -201 3 from the CMONOC a-round the epicenter of Lushan earthquake is used,the regional horizontal velocity and vertical deformation are cal-culated,and the coseismic displacement of the station near the epicenter is obtained.Based on the station baselines and strain parameter time series,the regional crustal deformation and strain accumulation background are re-searched;further analysis with the block information separation method shown that the abnormal deformation may exist before the earthquake.The main results got in this paper include:the earthquake region is in the block extru-sion “shunt”zone,and the crustal horizontal movement is small.In the second half of 201 2,a trend of deviation from the original motion was shown by the baseline of QHBM-SCSN and QHBM-SCXJ.Results of deformation sepa-rated from the time series of SCXJ station also showed that,the N and E component of the internal strain contribu-tion had a curve-transition phenomenon.关键词
芦山7.0级地震/连续GPS数据/地壳运动/应变/时间序列Key words
Lushan M7.0 earthquake/GPS continuous data/crustal movement/strain/time-series分类
天文与地球科学引用本文复制引用
丁晓光,闫伟,张艺,苏利娜,张永奇..利用连续GPS资料分析芦山7.0级地震区域地壳变形特征[J].灾害学,2015,(1):56-62,7.基金项目
国家“十二五”科技支撑计划（2012BAK19B02）；中国地震局地震行业专项 （）
