Upstream Shocks and Interplanetary Magnetic Cloud Speed and Expansion: Sun, Wind, and Earth Observations Lepping, R. P. ; Berdichevsky, D. ; Szabo, A. ; Lazarus, A. J. ; Thompson, B. J. Abstract Publication: Space Weather Study Using Multipoint Techniques Pub Date: 2002 Bibcode: 2002swsm.conf...87L