Coseismic and Postseismic Displacement of 2011 Mw 6.8 Tarlay Earthquake, Myanmar using InSAR Techniques and Inversion Analysis
Keywords:Tarlay Earthquake, Nam Ma FaultCoseismic Motion, Postseismic Motion, Inversion, InSAR, Coulomb stress change
In this study, we investigate the March 24th 2011 Mw=6.8 Tarlay earthquake, Myanmar using Interferometric Synthetic Aperture Radar (InSAR) and inversion analysis. We firstly invert InSAR coseismic displacement from our previous study. The inversions are carried out in both single and multi-patch model. The coseismic slip of 2.5 meter from single-patch solution is then combined with long-term slip rate from geomorphological study, resulting in an estimate of 1,140 - 4,160 years recurrence period. Then, coulomb stress changes on nearby faults in northern Thailand are calculated. It is found that stress in western and middle segments of Mae Chan fault decreases significantly while stress increase in eastern segment of Mae Chan, Mae Ing and Chiang Kham fault. Finally, the results from PSInSAR of 29 Radarsat-2 images reveal postseismic displacement rates between -24.4.6 to 34.5 millimeters per year
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