Analysis and Monitoring of Crustal Deformation in Wenchuan Earthquake
详细信息
- 责任者：Bai Guixia (Shaanxi Bureau of Surveying and Mapping ; Xi’an 710054 ; China) ; Cheng Chuanlu
- 刊名：Journal of Earth Sciences and Environment
- 出版年：2010
- 卷期：32(2)
- 关键词：汶川地震2008 ; Wenchuan earthquake 2008 ; 地形变 ; ground deformation ; 四川 ; Sichuan Province
- 页码：p.205-210
- 图表：10 illus., 3 tables, 14 refs.
- 分类号：0500
- issnNo：ISSN1672-6561
- isbnNo：CN61-1423/P
摘要
Analysis and monitoring of crustal deformation are of significance to study the influence of Wenchuan Earthquake to the topographical change of seismical region and Qinghai-Tibet Plate.Observation data of crustal deformation before and after Wenchuan Earthquake in related monitoring stations were collected.Based on uniform model,the data of monitoring of crustal deformation before and after Wenchuan Earthquake were calculated to ITRF2005 reference frame and 2008.363 epochs(May 12,2008).The result showed that the geodetic datum of epicenter area was damaged seriously;the deformation of monitoring stations had been deformed and dislocated with horizontal displacement of 243 cm,settlement of 68 cm and uplift amount of 36 cm.In addition,deformation monitoring of Wenchuan Earthquake was discussed.The result showed that the west block of "Yingxiuzhen-Beichuan-Qingchuan" fault zone had moved to the southeast and had taken on an uplift trend;the east block had moved to the northwest and had taken on a downward trend;the north block had moved to the northeast,the south block had moved to the southwest,both sides of blocks formed a clear extruded shape.The results laid a solid foundation for revealing the mechanism of Wenchuan Earthquake and the movement of Longmen Mountain fault zone.