Some implications on substorm dynamics inferred from correlations between multiple flux peaks of drifting high energy proton clouds and ground observations

Details Some implications on substorm dynamics inferred from correlations between multiple flux peaks of drifting high energy proton clouds and ground observations Some implications on substorm dynamics inferred from correlations between multiple flux peaks of drifting high energy proton clouds and ground observations

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990angeo...8..327i&link_type=abstract

Annales Geophysicae (ISSN 0992-7689), vol. 8, May 1990, p. 327-336.

Physics

18

Geomagnetic Pulsations, Magnetic Storms, Proton Energy, Proton Flux Density, Energetic Particles, Magnetospheric Proton Density, Synchronous Satellites

Scientific paper

By using auroral and geomagnetic pulsation data, it is shown that the proton clouds which are responsible for the multiple peak structure in the energetic proton flux observed at geostationary orbit, are impulsively injected in the nightside of the magnetosphere in close association with the impulsive development of the substorm expansion. The longitudinal extent and duration of an elementary injection associated with one peak in the proton flux is estimated by using the temporal duration of the proton flux enhancement and the proton drift velocity derived from simultaneous measurements at two geostationary satellites. The upper limits of these quantities were found to be 1-3 hour LT sectors in longitude and 2-3 min in time, respectively.

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