- 责任者：Gu Guohua (Institute of Earthquake Science ; China Earthquake Administration ; Beijing 100036 ; China) ; Meng Guojie
- 刊名：Acta Seismologica Sinica
- 出版年：2011
- 卷期：33(3)
- 关键词：汶川地震2008 ; Wenchuan earthquake 2008 ; 地壳运动 ; crustal movement ; 四川 ; Sichuan Province
- 页码：p.319-326
- 图表：5 illus., 2 tables, 5 refs.
- 分类号：0500
- issnNo：ISSN0253-3782
- isbnNo：CN11-2021/P
ARGIN: 0cm 0cm 0pt" class=MsoNormal>ang=EN-US>ary name="EnDivSummary">///Displacement time series of precise single epoch positioning imminently before Wenchuan earthquake, and shortly after the earthquake at 5 GPS stations of PIXI, CHDU, JYAN, NEIJ and LUZH are obtained from the double difference positioning of the BERNESE software. Through analysis on the best fit result and comparison of different results, the accuracy of the single epoch solutions is discussed. The result show that there were significant anomalies in 3 displacement components of NEU at LUZH station before the earthquake, while the vertical displacements at stations of PIXI, JYAN and NEIJ, close to or near the epicenter, were quite significant within 1 hour before the earthquake. All these changes are significantly larger than the RMS (rooted mean squares) of the single epoch positioning solutions.