Coseismic and Postseismic Displacement of 2011 Mw 6.8 Tarlay Earthquake, Myanmar using InSAR Techniques and Inversion Analysis

  • Pattama Phodee Chulalongkorn University
  • Itthi Trisirisatayawong Chulalongkorn University
  • Anuphao Aobpaet Geo-Informatics and Space Technology Development Agency (Public Organization)
Keywords: Tarlay Earthquake, Nam Ma FaultCoseismic Motion, Postseismic Motion, Inversion, InSAR, Coulomb stress change

Abstract

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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Author Biographies

Pattama Phodee

Department of Survey Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Itthi Trisirisatayawong

Department of Survey Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Anuphao Aobpaet

Geo-Informatics and Space Technology Development Agency (Public Organization), Bangkok 10520, Thailand

Published In
Vol 19 No 2, Apr 30, 2015
How to Cite
[1]
P. Phodee, I. Trisirisatayawong, and A. Aobpaet, “Coseismic and Postseismic Displacement of 2011 Mw 6.8 Tarlay Earthquake, Myanmar using InSAR Techniques and Inversion Analysis”, Eng. J., vol. 19, no. 2, pp. 157-169, Apr. 2015.