Inversion of the Rupture Process of the 2021 Alaska M W8.2 Earthquake
Abstract Based on GPS near field displacements and teleseismic P waves, this paper applies finite fault inversion method to inverse the fault rupture process of 202-07-29 Alaska MW8.2 earthquake. The result shows that the duration of the earthquake is about 100 s and the seismic moment is about 1.59×1021 Nm. The fault rupture slip extends from the epicenter along the fault to the NEE direction, and the magnitude of fault slip is larger in the northeast side of the epicenter. The surface deformation of the earthquake is analyzed by GPS data and dislocation theory model. It is considered that the coseismic deformation is consistent with the elastic rebound model of megathrust earthquakes. Due to the fault locking, the Pacific plate subducted the north American plate, so that the upper north American plate is continuously squeezed for a long time. At the time of the earthquake, the North American plate immediately changed into tension relaxation.
W8.2 earthquake coseismic displacements
fault slip distribution
YU Yi, LI Xue, SUN Zhen, LIU Zhumei, ZHANG Chaoyang.
[J]. jgg, 2023, 43(1): 46-51. Investigation on Focal Mechanism and Coseismic SlipDistribution for Menyuan Earthquake in 2022
ZHANG Yilei,BIAN Jiawen,DING Kaihua,RAN Jianuo,LIU Wenping.
[J]. jgg, 2022, 42(9): 904-909. GPS Coordinate Time Series Reconstruction Based on ICEEMDAN and SSA Joint Algorithm
GUO Shiwei,SHI Chuang,WEI Na,ZHANG Tao.
[J]. jgg, 2022, 42(8): 790-795. Effect of Geocenter Motion Induced by Ocean Tide Loading on Periodic Signals of GPS Position Time Series
[J]. jgg, 2022, 42(8): 840-845. A Simplified Model for DCB Estimation and Its Assessment Analysis
CHEN Yang,WU Mingkui,LIU Wanke,LUO Xiaomin.
[J]. jgg, 2022, 42(7): 722-727. Performance Analysis of BDS-3/GPS/Galileo Triple-Frequency Ambiguity Resolution Based on Geometry-Free Model
XU Zheng,WAN Shenglai,GUOQiang,WANG Chuang,FENG Siyu.
[J]. jgg, 2022, 42(7): 740-744. Application of Robust Helmert Estimation in Weight Ratio Allocation of BDS/GPS Integrated Positioning
YU Teng,ZHU Yimin,ZHANG Peng,WANG Xin,SHI Kunpeng,XU Zhaoxia.
[J]. jgg, 2022, 42(6): 569-576. Characteristics of Jiangsu Segment of Tan-Lu Fault Zone and Its Adjacent Areas Revealed by Multi-Source Remote Sensing
WANG Guangzhe,GUO Jinyun,GUO Hengyang,YANG Zhouming,JI Bing,PENG Hailong,LIN Mingsen.
[J]. jgg, 2022, 42(5): 472-476. Analysis of HY-2B Onboard GPS Data Quality and Reduced-Dynamic Precise Orbit Determination
ZHANG Caihong,TAN Kai,WANG Dongzhen,LI Yu,ZHAO Bin.
[J]. jgg, 2022, 42(3): 231-233. Analysis on the Features of Dynamic Displacements Caused by Madoi Earthquake Based on GPS High Rate Signal
ZHANG Licheng,BO Wanju.
[J]. jgg, 2022, 42(3): 234-239. Multi-Means Deformation Monitoring and Earthquake Prediction
WANG Zhaoyang,XING Zhe,ZHANG Feng,YANG Xiaotong,WANG Liyan.
[J]. jgg, 2022, 42(2): 132-138. Noise Analysis of the GPS Coordinate Time Series in the West Antarctic with Consideration of Common Mode Error
LI Chengtao,LI Qi,TAN Kai,LU Xiaofei.
[J]. jgg, 2022, 42(2): 153-157. Coseismic Deformation Field and Fault Slip Distribution of the 2021 Shuanghu M S5.8 Earthquake Revealed by InSAR Data
XIONG Shizhao,LIU Gang,LIN Mu,WANG Dijin,XIONG Wei,ZHAO Lijiang,ZHAO Bin,QIAO Xuejun.
[J]. jgg, 2022, 42(10): 1041-1046. Coseismic Static and Kinematic Deformation Field of 2021 Maduo M W7.4 Earthquake Derived by GPS
ONG Qi,GAO Ertao,YU Hangming,LAN Yanping.
[J]. jgg, 2022, 42(1): 59-64. Research on the Sensitivity of Deep Slip Inversion for Earthquake Fault Slip Constrained by InSAR and GPS Geodetic Deformation Data
WANG Xiaolei,NIU Zijin,HE Xiufeng.
[J]. jgg, 2021, 41(9): 929-933. Precipitation Analysis and Judgment Based on GPS Water Vapor Retrieval and GPS-IR