NTRS - NASA Technical Reports Server

Back to Results
Relativistic Electron Response to the Combined Magnetospheric Impact of a Coronal Mass Ejection Overlapping with a High-Speed Stream: Van Allen Probes ObservationsDuring early November 2013, the magnetosphere experienced concurrent driving by a coronal mass ejection (CME) during an ongoing high-speed stream (HSS) event. The relativistic electron response to these two kinds of drivers, i.e., HSS and CME, is typically different, with the former often leading to a slower buildup of electrons at larger radial distances, while the latter energizing electrons rapidly with flux enhancements occurring closer to the Earth. We present a detailed analysis of the relativistic electron response including radial profiles of phase space density as observed by both Magnetic Electron and Ion Sensor (MagEIS) and Relativistic Electron Proton Telescope instruments on the Van Allen Probes mission. Data from the MagEIS instrument establish the behavior of lower energy (<1 MeV) electrons which span both intermediary and seed populations during electron energization. Measurements characterizing the plasma waves and magnetospheric electric and magnetic fields during this period are obtained by the Electric and Magnetic Field Instrument Suite and Integrated Science instrument on board Van Allen Probes, Search Coil Magnetometer and Flux Gate Magnetometer instruments on board Time History of Events and Macroscale Interactions during Substorms, and the low-altitude Polar-orbiting Operational Environmental Satellites. These observations suggest that during this time period, both radial transport and local in situ processes are involved in the energization of electrons. The energization attributable to radial diffusion is most clearly evident for the lower energy (<1 MeV) electrons, while the effects of in situ energization by interaction of chorus waves are prominent in the higher-energy electrons.
Document ID
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Kanekal, S. G.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Baker, D. N.
(Colorado Univ. Boulder, CO, United States)
Henderson, M. G.
(Los Alamos National Lab. NM, United States)
Li, W.
(California Univ. Los Angeles, CA, United States)
Fennell, J. F.
(Aerospace Corp. Los Angeles, CA, United States)
Zheng, Y.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Richardson, I. G.
(Maryland Univ. College Park, MD, United States)
Jones, A.
(Catholic Univ. of America Washington, DC, United States)
Ali, A. F.
(Colorado Univ. Boulder, CO, United States)
Elkington, S. R.
(Colorado Univ. Boulder, CO, United States)
Jaynes, A.
(Colorado Univ. Boulder, CO, United States)
Li, X.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Blake, J. B.
(Aerospace Corp. Los Angeles, CA, United States)
Reeves, G. D.
(Los Alamos National Lab. NM, United States)
Spence, H. E.
(New Hampshire Univ. Durham, NH, United States)
Kletzing, C. A.
(Iowa Univ. Iowa City, IA, United States)
Date Acquired
May 9, 2016
Publication Date
September 29, 2015
Publication Information
Publication: Journal of Geophysical Research: Space Physics
Publisher: AGU Publications
Volume: 120
Issue: 9
Subject Category
Space Radiation
Spacecraft Instrumentation And Astrionics
Report/Patent Number
Funding Number(s)
Distribution Limits

Available Downloads

There are no available downloads for this record.
No Preview Available