Research Interests Solar magnetohydrodynamics (MHD): theoretical study of MHD wave propagation in stratied atmospheres. Observations of Chromospheric and Coronal oscillations, density and temperature diagnostic in solar atmosphere. Providing observational constraints for Solar wind and Space weather. Magneto-seismology. Space weather forecasting. Studies of small and large scale transients. Multi-wavelength study using ground and space based instruments. Imaging and spectroscopic instrumentation. Study of the long term variation of sun using Kodaikanal and other digitized archive. Space climate.