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Reply to Comment on “Coronal Mass Ejections, Interplanetary Ejecta and Geomagnetic Storms” by Gopalswamy Et Al.The comment of Gopalswamy et al. (thereafter GMY) relates to a letter discussing coronal mass ejections (CMEs), interplanetary ejecta and geomagnetic storms. GMY contend that Cane et al. incorrectly identified ejecta (interplanetary CMEs) and hypothesize that this is because Cane et al. fail to understand how to separate ejecta from "shock sheaths" when interpreting solar wind and energetic particle data sets. They (GMY) are wrong be cause the relevant section of the paper was concerned with the propagation time to 1 AU of any potentially geoeffective structures caused by CMEs, i.e. upstream compression regions with or without shocks, or ejecta. In other words, the travel times used by Cane et al. were purposefully and deliberately distinct from ejecta travel times (except for those slow ejecta, approx. 30% of their events, which generated no upstream features), and no error in identification was involved. The confusion of GMY stems from the description did not characterize the observations sufficiently clearly.
Document ID
20040030510
Acquisition Source
Goddard Space Flight Center
Document Type
Other - Brief Communication/Note
External Source(s)
Authors
Cane, H. V.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Richardson, I. G.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 21, 2013
Publication Date
December 16, 2003
Publication Information
Publication: Geophysical Research Letters
Publisher: AGU
Volume: 30
Issue: 24
ISSN: 0094-8276
e-ISSN: 1944-8007
Subject Category
Solar Physics
Distribution Limits
Public
Copyright
Other

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