Evolution of the outer radiation belt during the November 1993 storms driven by corotating interaction regions

Details Evolution of the outer radiation belt during the November 1993 storms driven by corotating interaction regions Evolution of the outer radiation belt during the November 1993 storms driven by corotating interaction regions

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jgra..11205210m&link_type=abstract

Journal of Geophysical Research, Volume 112, Issue A5, CiteID A05210

Physics

21

Magnetospheric Physics: Radiation Belts, Magnetospheric Physics: Energetic Particles: Trapped, Magnetospheric Physics: Magnetosphere: Inner, Magnetospheric Physics: Magnetic Storms And Substorms (7954), Magnetospheric Physics: Solar Wind/Magnetosphere Interactions

Scientific paper

Evolution of energetic electron fluxes, related solar wind conditions, and relevant plasma waves in the inner magnetosphere are examined during the two corotating interaction region (CIR)-driven magnetic storms in November 1993. In this paper we focus on the fact that the flux of the outer radiation belt electrons increased significantly during the 3 November storm, while it did not increase above the prestorm level during the 18 November storm. The recovery phase of the 3 November storm is associated with the prolonged substorm activity; continuous injections of hot and subrelativistic electrons, and enhanced chorus wave activity which can accelerate subrelativistic electrons to MeV energies by means of wave-particle interactions. In contrast, the recovery phase of the 18 November storm is associated with reduced substorm activity, weak injections of hot and subrelativistic electrons, and low chorus wave activity. These differences in the recovery phase can be related to the southward offset of interplanetary magnetic field (IMF) in the high-speed coronal hole stream, which is influenced by the IMF sector polarity via the Russell-McPherron effect (dipole tilt effect associated with the IMF polarity).

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