IGPP Seminar Series

Large-Scale Disturbances of the Coupled Magnetosphere-Ionosphere in Response to Abrupt Solar Wind Changes

by Prof. Larry Lyons
IGPP, UCLA

Abstract

Abrupt changes in the interplanetary magnetic field and plasma that impact the magnetosphere lead to large-scale disturbances of the magnetosphere-ionosphere system, which are dramatically observed in the aurora. The most widely discussed and controversial disturbance is the substorm. I will describe how disturbances features depend on the type of interplanetary change and will identify which changes lead to substorms and which do not. I will then describe how the fundamentals of plasma sheet transport within the magnetosphere offer a feasible explanation for the disturbances that results from interplanetary changes and for why some changes lead to substorms and others do not.
Tuesday, 05 December 2006
3845 Slichter Hall
Refreshments at 3:45 PM
Lecture at 4:00 PM