C. J. Farrugia
(Dept. of Mathematics Science and Technology Education, Univ. of Malta Malta)
R. P. Lepping,L. F. Burlaga,A. Szabo,D. Vassiliadis
M. P. Freeman
(British Antarctic Survey, Cambridge, United Kingdom)
This second presentation on the WIND magnetic cloud of October 18-20, 1995, is devoted to the geomagnetic effects due to its passage. In the first part of the presentation (Mish et al.), we describe effects expected to be elicited in the magnetosheath and in the magnetosphere-ionosphere system by this magnetic cloud. We base our predictions on the behavior of the field and plasma parameters within the cloud and associated interplanetary disturbances. In the second part of this talk, we will show and discuss radar, ground magnetometer and geostationary observations documenting various aspects of this magnetic cloud-magnetosphere interaction. In general terms, the 30-hour long cloud passage set off a major geomagnetic storm which was followed by a long quiet interval. Intense auroral and ring current activity was resumed at the time of the passage of the rear end of the cloud and just thereafter, which we attribute to the interaction of the interplanetary ejecta with faster flows at its rear.
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