Nine Years of GPS Measurements of Crustal Deformation at Imphal, Indo-Burmese Wedge
Authors
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Department of Earth Sciences, Manipur University, Imphal - 795 003
Laishram Sunil Singh -
CSIR-National Geophysical Research Institute, Hyderabad - 500 606
V. K. Gahalaut
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Department of Earth Sciences, Manipur University, Imphal - 795 003
Arun Kumar
Keywords:
GPS, Crustal Deformation, Indo-Burmese Wedge, Manipur.Abstract
We report results of 9 years of GPS measurements of crustal deformation at Imphal, Manipur, a site located in the Indo-Burmese wedge of northwest Sunda arc. The analysis of these measurements suggests that the site moves at a rate of about 36.3 ± 0.5 mm/year towards N55° in the ITRF2008. With respect to the Indian plate it moves at a rate of 16.7 mm/year towards N222°, i.e., predominantly towards southwest. The site is located about 15 km east of the Churachandpur Mao fault (CMF), which is reported to accommodate part of the India-Sunda motion. The site motion is not significantly affected by the earthquakes that occurred in the nearby region. However, the 2004 Sumatra-Andaman earthquake caused a coseismic displacement of ∼3-5 mm predominantly towards southwest. The site motion is almost linear, with some seasonal variation, and does not show any evidence of accelerated slip or slow earthquake on the CMF or along the plate boundary.Downloads
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References
BANERJEE, P., BURGMANN, R., NAGARAJAN, B. and APEL, E. (2008) Intraplate deformation of the Indian subcontinent, Geophys. Res. Lett., v.35, L18301, doi:10.1029/2008GL035468.
CURRAY, J.R. (2005) Tectonics and history of the Andaman sea region. Jour. Asian Earth Sci., v.25, pp.187-228.
FITCH, T.J. (1972), Plate convergence, transcurrent faults and internal deformation adjacent to Southeast Asia and the western Pacific. Jour. Geophys. Res., v.77, pp.4432-4460
GAHALAUT, V. K. and GAHALAUT, K. (2007) Burma plate motion. Jour. Geophys. Res., v.112, B10402, doi:10.1029/2007JB004928
GAHALAUT, V.K., BHASKAR KUNDU, SUNIL SINGH LAISHRAM, JOSHI CATHERINE, ARUN KUMAR, DEVCHANDRA, M., TIWARI, R.P. SAMANTA, S.K., AMBIKAPATHY, A., MAHESH, P., AMIT BANSAL, NARSAIAH, M. (2013) Aseismic plate boundary in the Indo-Burmese wedge, northwest Sunda Arc. Geology, v.41, pp.235-238. Doi:10.1130/GE33771.1.
HERRING, T.A. (2005), GLOBK: Global Kalman filter VLBI and GPS analysis program version 10.01, Mass. Inst. of Technol., Cambridge.
HERRING, T. A., KING, R.W. and MCCLUSKY, S.C. (2010a) GAMIT reference manual: GPS analysis at MIT, Release 10.4, Mass. Inst. of Technol., Cambridge.
HERRING, T. A., KING, R.W. and MCCLUSKY, S.C. (2010b) GLOBK Global Kalman Filter VLBI and GPS analysis program, Release 10.4, Mass. Inst. of Technol., Cambridge.
JADE, S., VIJAYAN, M.S.M., GUPTA, S.S., DILEEP KUMAR, P., GAUR, V.K. and ARMUGAM, S. (2007) Effect of M 9.3 Sumatra-Andaman Islands Earthquake of 26th December 2004 at some permanent and campaign GPS stations in the Indian continent. Internat. Jour. Remote Sensing, v.28, pp.3045-3054.
MCCAFFREY, R. (1992), Oblique plate convergence, slip vectors, and forearc deformation. Jour. Geophys. Res., v.97, pp.8905-8915.
MAURIN, T., MASSON, F., RANGIN, C., MIN, U.T. and COLLARD, P. (2010) First Global Positioning System results in northern Myanmar: Constant and localized slip rate along the Sagaing fault, Geology, v.38(7), pp.591-594, doi:10.1130/G30872.1.
NIELSEN, C., CHAMOT-ROOKE, N., RANGIN, C. and the ANDAMAN CRUISE TEAM (2004), From partial to full strain partitioning along the Indo-Burmese hyper-oblique subduction. Marine Geol., v.209, pp.303-327.
VIGNY, C., SOCQUET, A., RANGIN, C., CHAMOT-ROOKE, N., PUBELLIER, M., BOUIN, M. , BERTRAND, G. and BECKER, M. (2003) Presentday crustal deformation around Sagaing fault, Myanmar. Jour. Geophys. Res., 108(B11), 2533, doi:10.1029/2002JB001999.
