Post-2004 mega-earthquake temporal velocity variation at Andaman Islands from GPS measurements

S. Som (), Ashim Saha and Vijay Shivgotra

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2014, vol. 72, issue 2, 1062 pages

Abstract: Post-mega-earthquake velocity adjustment at Andaman region was found to vary with time. Coordinate repeatability for 5-year span shows changeover from post-seismic to inter-seismic period in between 900 and 1,000 days from the mega-earthquake. Excluding Havlock Island, all sites move from south to north and from east to west. Velocity vectors gradually rotated from the nearly perpendicular orientation after the mega-earthquake to parallel orientation with the subduction interface in later phase. Velocities in India 2005 reference frame indicate the presence of a structural discontinuity between Bedonabad and Chidiatapu at south Andaman, between Padmanavapuram and Kaushalyanagar at middle Andaman and between Aerial Bay and Radhanagar at north Andaman. Copyright Springer Science+Business Media Dordrecht 2014

Keywords: Andaman; GPS; Velocity (search for similar items in EconPapers)
Date: 2014
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DOI: 10.1007/s11069-014-1051-5

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