Back to matchesWe found a matchYour institution may have rights to this item. Sign in to continue.TitleNo evidence for externally triggered substorms based on superposed epoch analysis of IMF B<sub> z</sub>.AuthorsFreeman, M. P.; Morley, S. K.PublicationGeophysical Research Letters, 2009, Vol 36, Issue 21, pn/aISSN0094-8276Publication typeArticleDOI10.1029/2009GL040621