Dr. Sunil Kumar Roy

Senior Scientist , Seismology

Dr. Sunil Kumar Roy

sunilkroy.ngri@csir.res.in

Academic Identity
     

Specialization

Seismology

Research Area

Dr. Sunil K. Roy received his PhD from Osmania University, Hyderabad, in 2016. As a postdoctoral fellow, he visited the Earthquake Research Institute, University of Tokyo, Japan, for a year (2017-2018). Dr. Roy's research interest lies in characterizing the crustal and upper mantle deformation patterns, and inferring the structure and deformation of lowermost mantle. He worked extensively to understand the past and present mantle deformation in both the stable and actively deforming regions of the India and subduction zones. Some of his major significant contributions are: i) The major contribution to upper mantle anisotropy beneath India is from shearing in the upper part of the asthenosphere, with a weakly anisotropic contribution from the Indian lithosphere, ii) Obtaining evidence of azimuthal anisotropy in the lowermost mantle beneath southeast Asia, and iii) Marked the edge and thickness of western Pacific large-low shear velocity province.

Ongoing Research Projects

MLP-7008-28 (PK)

Honors & Awards

Publications

  1. Devi, A., Roy*, S.K., Kanaujia, J., Vempati, V. and Kumar, M.R., 2025. Variations in mantle flow beneath the Eastern Himalaya inferred from shear wave splitting. Phys. Earth Planet. Inter., 107364.
  2. Roy*, S.K., Kumar, M.R., Kanaujia, J., Gupta, S., Singh, B., Mandal, P. and Srinagesh, D., 2024. Insights into the mechanisms forging seismic anisotropy in the upper mantle beneath India. Tectonophysics, 888, 230454.
  3. Devi, A., Roy*, S.K., Kanaujia, J. and Kumar, M.R., 2024. Evidence for weak azimuthal anisotropy beneath the Kumaon-Garhwal Himalaya. Geophys. J. Int., 237(3), pp.1734-1750.
  4. Roy*, S. K., Shashidhar, D., 2023. Spatial variation in the crustal deformation pattern in the Koyna-Warna region, western India using shear wave splitting. Geophy. J. Int. 235, 1339-1352.
  5. Roy*, S. K., Srinagesh, D., Suresh, G., Srinivas, D., 2021. Seismicity and Disparate deformation of the crust and upper mantle beneath the Doda-Kisthwar region, NW Himalaya. Phys. Earth Planet. Inter. 310, 106635.
  6. Roy*, S. K., Takeuchi, N., Srinagesh, D., Kumar, M. R., Kawakatsu, H., 2019. Topography of the western Pacific LLSVP constrained by S wave multipathing. Geophy. J. Int. 218, 190-199.
  7. Roy, S. K., Kumar, M. R., Srinagesh, D., 2017. Anisotropy in subduction zones: Insights from new source side S-wave splitting measurements from India. J. Geophy. Res.: Solid Earth. 122, 6454-6472.
  8. Roy, S.K., Kumar, M.R., Bhaskar Rao, Y.J., Srijayanthi, G., Srinagesh, D., Satyanarayana, H.V., Sarkar, D., 2016. Imprints of diverse mantle deformational episodes in the Cauvery Suture Zone, South India. Precambrian Res. 278, 207-217.
  9. Roy, S.K., Kumar, M.R., Srinagesh, D., 2014. Upper and lower mantle anisotropy inferred from comprehensive SKS and SKKS splitting measurements from India. Earth Planet. Sci. Lett. 392, 192-206.
  10. Roy, S.K., Srinagesh, D., Saikia, D., Singh, A., Kumar, M.R., 2012. Seismic anisotropy beneath the Eastern Dharwar Craton. Lithosphere 4(4), 259-268.

Books

Research Scholars

PhD Students

Dr. Arti Devi (Januray 2021 - December 2024, Co-Supervisor, Awarded)

Tiltle: Imprints of India-Asia collision on the upper mantle deformation benath the Himalaya and its foredeep

Educational Qualification

PhD

Proffessional Experience

Proffessional Affiliations

Life Member: Indian Society of Earthquake Science (ISES), India

Member:         American Geophysical Union (AGU), USA

                       Japan Geophysical Union (JpGU), Japan