Study of the geoeffectiveness of interplanetary magnetic clouds

Magnetic clouds are mass ejections observed in the interplanetary space with specific field structures. These structures have been observed in the interplanetary data and through spacecraft in near-earth space. These magnetic clouds have north-south or south-north magnetic field orientations. Some of them are associated with shock/sheath region preceding them. Their speed is not the same; they move with different velocities in the interplanetary space. The magnetic clouds observed in the near-earth space have different field orientations, move with different speed, and different features are associated with them. As the field orientations in them, their speed and associated features are likely to influence the geo-effectiveness of magnetic clouds, we consider the magnetic clouds with distinct properties and study their relative geo-effectiveness. We also investigate the solar wind plasma/field parameters that play important role in influencing the geo-effectiveness of magnetic clouds. The implications of this study on the solar wind-magnetosphere coupling are also examined.