Dr. M. Ravi Kumar received his B.Sc (Hons.), M.Sc. (Tech.) and Ph.D. degrees from the Osmania university, Hyderabad. He has been working as a scientist at the National Geophysical Research Institute, Hyderabad, for the past 23 years pursuing research in the field of earthquake seismology together with a number of students and collaborators. He has designed and executed several passive seismological experiments in geologically complex and diverse terrains in the Indian shield and eastern Himalaya. Dr. Kumar developed and applied new seismological techniques to investigate the shear structure, composition and deformation of the lithosphere and sub-lithospheric mantle and decipher their bearing on the evolution of the disparate geological terrains and seismogenesis. He has provided new understanding of the geodynamics of the Indian tectonic plate through high resolution imaging of the deep structure of its stable and actively deforming regions.