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- Title
Pre-seismic and Co-seismic Deformation of Ms 7.0 Earthquake in Lushan.
- Authors
YANG Guohua; ZHU Shuang; LIANG Hongbao; YANG Bo
- Abstract
Based on the GNSS data processing results from the Sichuan area, following conclusions are obtained : ➀ Before the Ms 8. 0 earthquake in Wenchuan, there was almost no dextral strike-slip ac tivity distinguished or compressional deformation on the Longmenshan fault zone and nearly 150 km north of it, and was deformation distinguished in the area of 100 kms west of Sichuan Basin--the Xianshuihe Anninghe Fault. ➁ Between the Ms 8. 0 earthquake in Wenchuan and Ms 7. 0 earthquake in Lushan, there was about a 5 mm/a dextral strike-slip activity in the middle and northern sections of the Longmenshan fault zone, with no 3D deformation distinguished in and near the seismic source region. Meanwhile the sinistral deformation increased on the Xianshuihe Anninghe fault and east of the zone. ➂ The co-seismic deformation field of the Lushan earthquake was basically distributed for 10 kilometers around the seismic source region, with an epicenter bounded,on the east side as a dextral deformation, on the west side with a sinistral deformation. ➃ LS05 was about 12 km to the epicenter; the permanent vertical displacement momentum was around 7 cm, with a horizontal thrust momentum of about 4 cm, the horizontal strike-slip was about 5 cm from the station.
- Subjects
CHINA; EARTHQUAKES; GLOBAL Positioning System; FAULT zones; DEFORMATIONS (Mechanics); DISPLACEMENT (Mechanics)
- Publication
Geomatics & Information Science of Wuhan University, 2015, Vol 40, Issue 1, p121
- ISSN
1671-8860
- Publication type
Article
- DOI
10.13203/j.whugis20130186