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Published April 2014 | Supplemental Material + Published
Journal Article Open

Active tectonics and earthquake potential of the Myanmar region

Abstract

This paper describes geomorphologic evidence for the principal neotectonic features of Myanmar and its immediate surroundings. We combine this evidence with published structural, geodetic, and seismic data to present an overview of the active tectonic architecture of the region and its seismic potential. Three tectonic systems accommodate oblique collision of the Indian plate with Southeast Asia and extrusion of Asian territory around the eastern syntaxis of the Himalayan mountain range. Subduction and collision associated with the Sunda megathrust beneath and within the Indoburman range and Naga Hills accommodate most of the shortening across the transpressional plate boundary. The Sagaing fault system is the predominant locus of dextral motion associated with the northward translation of India. Left-lateral faults of the northern Shan Plateau, northern Laos, Thailand, and southern China facilitate extrusion of rocks around the eastern syntaxis of the Himalaya. All of these systems have produced major earthquakes within recorded history and continue to present major seismic hazards in the region.

Additional Information

© 2014 The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. Received 9 OCT 2013; Accepted 9 MAR 2014; Accepted article online 15 MAR 2014; Published online 25 APR 2014. We have benefited greatly from discussions with Win Swe and other friends in Myanmar during our stays in Yangon. We also appreciate assistance from members of the Myanmar Geosciences Society (MGS), the Department of Meteorology and Hydrology (DMH) of Myanmar since 2006. This research was supported initially by the Caltech Tectonics Observatory and later by the Earth Observatory of Singapore (EOS), Nanyang Technological University, Singapore. This is Caltech Tectonics Observatory contribution 258 and Earth Observatory of Singapore contribution 56.

Attached Files

Published - jgrb50602.pdf

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