Post-2004 mega-earthquake temporal velocity variation at Andaman Islands from GPS measurements
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
Year of publication: |
2014
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Authors: | Som, S. ; Saha, Ashim ; Shivgotra, Vijay |
Published in: |
Natural Hazards. - International Society for the Prevention and Mitigation of Natural Hazards. - Vol. 72.2014, 2, p. 1051-1062
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Publisher: |
International Society for the Prevention and Mitigation of Natural Hazards |
Subject: | Andaman | GPS | Velocity |
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