Markov Chain Monte Carlo Method Used to Invert for Fault Slip from Geodetic Data
Abstract Fault slip inversion can be represented by a regularization problem constrained with inequalities.Based on the improved MCMC approach, we invert for coseismic fault slip distribution of the 2015 Nepal megathrust event from GPS observations. Results show that the slip concentrates at a region eastward to the epicenter, near Kathmandu, with a maximum of 7 m. The slip errors statistically obtained by resampling model space are about 10% of slip. The seismic moment is 7.67×1020 Nm, equivalent to MW7.86, consistent with that from other research. The modeled GPS displacements agree well with the observations. Our results demonstrate that the improved MCMC method is appropriate for fault slip inversion from geodetic data and especially can give the slip errors statistically.
Key words :
geodetic data
fault slip inversion
MCMC
Bayesian
Nepal earthquake
Cite this article:
ZHOU Xin. Markov Chain Monte Carlo Method Used to Invert for Fault Slip from Geodetic Data[J]. jgg, 2017, 37(10): 996-1002.
ZHOU Xin. Markov Chain Monte Carlo Method Used to Invert for Fault Slip from Geodetic Data[J]. jgg, 2017, 37(10): 996-1002.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2017/V37/I10/996
[1]
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.
[2]
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.
[3]
MA Yu,ZHU Fuying. Research on Co-Seismic Ionospheric Disturbance due to the Nepal MW 7.8 Earthquake Based on GPS TEC [J]. jgg, 2020, 40(9): 957-961.
[4]
YANG Zhongrong,YUAN Linguo,JIANG Zhongshan,DU Wencheng,ZHANG Ningning. Temporal-Spatial Distribution of Post-Seismic Afterslip Associated with the 2015 MW 7.9 Nepal Earthquake [J]. jgg, 2018, 38(9): 891-896.
[5]
ZHAO Bin, WANG Dongzhen,TAN Kai,LIU Jingnan,ZHANG Caihong,DU Ruilin, ZHANG Rui, HUANG Yong. Afterslip Model Following the 2015 Nepal MW7.9 Earthquake Considering Viscoelastic Relaxation Displacements [J]. jgg, 2018, 38(3): 239-243.
[6]
WANG Dongzhen,ZHAO Bin,YU Jiansheng,TAN Kai. Pre- and Post-Seismic Deformation of Nepal MS 8.1 Earthquake Derived from GPS Data [J]. jgg, 2017, 37(6): 579-584.
[7]
QU Wei,AN Dongdong,XUE Kang,ZHANG Qin,WANG Qingliang,WANG Dong. Gravity Variations before and after the M8.1 Nepal Earthquake Observed by the GRACE [J]. jgg, 2017, 37(12): 1214-1218.
[8]
ZHANG Xin,YE Qing. Sequence Analyses and Wavelet Spectrum Characters of Co-Seismic Deformation Wave Record in Fujian-Guangdong Area [J]. jgg, 2017, 37(12): 1302-1307.
[9]
LI Yaping,SUN Fuping,DING He,et al. Study on the Plate Boundary Model NNR-MORVEL56 [J]. jgg, 2016, 36(3): 265-269.
[10]
LI Junchao,KANG Bo,CHEN Xingxing,WANG Qiuliang. Fluid Dynamic and Seismic Response Analysis of Nepal M8.1 Earthquake with the Danjiangkou Well Network [J]. jgg, 2016, 36(11): 1025-1030.
[11]
ZHAO Bin,TAN Kai,ZHANG Caihong,HUANG Yong,DU Ruilin,ZHANG Rui,QIAO Xuejun. ]Interseismic Coupling and Coseismic Displacements
of the 2015 Mw7.9 Nepal Earthquake [J]. jgg, 2015, 35(5): 734-737.
[12]
KANG Kaixuan,LI Hui,LIU Shaoming,HAO Hongtao,ZOU Zhengbo . Long-Term Gravity Changes in Tibet and Its Vicinity before the Nepal Ms8.1 Earthquake [J]. jgg, 2015, 35(5): 742-746.
[13]
ZOU Zhengbo,LI Hui,WU Yunlong,WU Guiju,KANG Kaixuan. Characteristics of Satellite Time-Variable Gravity
Field before M8.1 Nepal Earthquake [J]. jgg, 2015, 35(4): 547-551.
[14]
Deng Xingsheng, Cheng Shiqiao, Ding Meiqing. DEFORMATION MONITORING NETWORK ADJUSTMENT WITH
CONSIDERING PRIOR INFORMATION [J]. jgg, 2013, 33(2): 45-48.
[15]
Heng Guanghui ;Gui Qingming;and Li Guozhong;. BAYESIAN METHOD FOR DETECTION OF GROSS ERRORS IN GPS VECTOR NETWORK [J]. , 2010, 30(1): 136-139.