Magnetospheric phenomena

241-256The solar wind-magnetosphere interaction processes and the coupling between ionosphere and magnetosphere are reviewed. The role of interplanetary magnetic field in the magnetic reconnection at the dayside magnetosphere as well as in the tail is discussed. Direct and indirect observations of reconnection at dayside and the ISEE satellite observations of plasmoid in the trail are described to establish the reconnection model of magnetosphere beyond any doubt. Significant progress made in our understanding of many important ionospheric and magnetospheric phenomena including substorm through ionosphere-magnetosphere coupling has also been surveyed. Very low frequency (VLF) emissions and auroral kilometric radiations (AKRs) in the earth’s magnetosphere have been discussed on the basis of wave-particles and wave-eave interactions, and powerful plasma processes in exchanging energy between waves and particles. Suggestions for future work on the solar wind interaction with magnetosphere in the presence of northward component of IMF and emission processes on the basis of wave-wave particle interaction have been made