Post-Seismic Deformation Associated with the 2008 Wenchuan Earthquake by Long-Term GPS Data
Abstract In this paper, we process relatively dense GPS data from continuous and campaign stations spanning over 7 years ofter the 2008 Wenchuan earthquake in the Songpan-Ganzi terrane and explore a series of viscoelastic relaxation models using the PSGRN/PSCMP program. We examined the existence of the proposed lower crust flow under the eastern Tibetan plateau. Our results show that the best-fitting steady-state viscosity of the thin low velocity zone is approximately 2.51×1018 Pa·s, while the Maxwell viscosity of the middle-lower crust beneath the Plateau is around 3.98×1018 Pa·s.
Key words :
Wenchuan earthquake
postseismic deformation
viscoelastic relaxation
low-velocity layer
GPS
Cite this article:
HE Kefeng,ZHAO Bin,DU Ruilin. Post-Seismic Deformation Associated with the 2008 Wenchuan Earthquake by Long-Term GPS Data[J]. jgg, 2019, 39(2): 122-126.
HE Kefeng,ZHAO Bin,DU Ruilin. Post-Seismic Deformation Associated with the 2008 Wenchuan Earthquake by Long-Term GPS Data[J]. jgg, 2019, 39(2): 122-126.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2019/V39/I2/122
[1]
ONG Qi,GAO Ertao,YU Hangming,LAN Yanping. Research on the Sensitivity of Deep Slip Inversion for Earthquake Fault Slip Constrained by InSAR and GPS Geodetic Deformation Data [J]. jgg, 2022, 42(1): 59-64.
[2]
WANG Xiaolei,NIU Zijin,HE Xiufeng. Precipitation Analysis and Judgment Based on GPS Water Vapor Retrieval and GPS-IR [J]. jgg, 2021, 41(9): 929-933.
[3]
JI Chunling,DONG Bo,ZHANG Yang,ZHOU Anpin. Study on Temporal and Spatial Variation of Fluid Solid Tide Parameters before the Tangshan Guye MS5.1 Earthquake in 2020 [J]. jgg, 2021, 41(8): 821-826.
[4]
ZHANG Jian,ZHAO Bin,WANG Dongzhen,WANG Haibin,LIU Zhijun. Probing the Rheological Structure of Southern Tibet from the Postseismic Deformation of the 2015 MW 7.8 Nepal Earthquake [J]. jgg, 2021, 41(8): 827-832.
[5]
YAO Weizheng,XU Keke,ZHU Xulin,SHAO Zhenhua. Postseismic Deformation and Dynamic Mechanism Associated with the 2015 MW 7.8 Nepal Earthquake from GPS Observation [J]. jgg, 2021, 41(8): 833-840.
[6]
YIN Weiwei,ZHANG Hui. Using Focal Mechanism to Distinguish Types of Earthquake Events in Shanxi [J]. jgg, 2021, 41(8): 846-852.
[7]
ZHAO Rui,ZHU Xinyun,LI Junchao. Exploring the Attenuation Characteristics of Coda Wave of Lg-Wave at Zhongxiang Seismic Station by Using Stack Spectral Ration Method [J]. jgg, 2021, 41(8): 877-880.
[8]
WANG Juntao,ZHU Yongchao,GAO Fei,LI Jiangyang,TAO Tingye. Research on Detection Method of Water Distribution of Spaceborne GNSS-R Based on CYGNSS Data [J]. jgg, 2021, 41(8): 777-782.
[9]
TIAN Xiao,ZHAN Wei,ZHENG Hongyan,YIN Haiquan. Characteristics of Present-Day 3D Crustal Movement of Sichuan-Yunnan Region [J]. jgg, 2021, 41(7): 739-746.
[10]
LIU Zhijun,TAN Kai,WANG Qi,WANG Lei,ZHANG Jian,ZHAO Bin,QIAO Xuejun. Numerical Simulation Analysis of After-Slip and Viscoelastic Relaxation after the Wenchuan Earthquake [J]. jgg, 2021, 41(6): 577-583.
[11]
ZHAO Wenhao,LIU Genyou,WANG Shengliang,GAO Ming. GPS-L1/BDS-B1 Non-Overlapping Frequency Tight Combination Relative Positioning [J]. jgg, 2021, 41(6): 618-622.
[12]
LI Chengtao,LI Qi,TAN Kai,LU Xiaofei,ZUO Xiao. Coseismic Deformation Field of the 2020 Turkey MW5.7 Earthquake from Sentinel-1A InSAR Data and Rupture Slip Distribution [J]. jgg, 2021, 41(5): 484-490.
[13]
DAI Zhihong,LU Peng,ZHANG Zhifang,WANG Xiaolong,XU Guo,DONG Jianming. Surface Subsidence Monitoring and Analysis of Nanning Based on PS-InSAR Technology [J]. jgg, 2021, 41(5): 491-496.
[14]
GAO Chenxuan,KE Baogui,ZHANG Chuanyin,LI Wanqiu,ZHANG Jian. Monitoring of Surface Vertical Deformation from Terrestrial Water Loading in Taizhou Region by the CORS Network [J]. jgg, 2021, 41(5): 501-505.
[15]
ZHAO Zhichuang,ZHANG Yan,ZHAO Ying. Recognition Analysis on Anomalous Characteristics of Imminent Earthquake——Taking Wenchuan Earthquake as an Example [J]. jgg, 2021, 41(5): 544-549.