Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3123801h&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 23, CiteID L23801
Physics
7
Magnetospheric Physics: Energetic Particles, Precipitating, Trapped, Magnetospheric Physics: Magnetosphere-Outer, Magnetospheric Physics: Storms And Substorms, Magnetospheric Physics: Magnetosphere/Ionosphere Interactions
Scientific paper
We study the two storm events of 1997: one in May that was accompanied by a relativistic electron event (REE) and the other in September, with a more profound Dst decrease, but with no significant flux increase of relativistic electrons. We find that a larger amount of seed electrons was present in the May event compared to that of the September storm, whereas the ULF (ultra low frequency) power was more enhanced and the particle spectrum was harder in the September event. Hence, we demonstrate that a larger storm does not necessarily produce more seed electrons and that the amount of seed electrons is an important factor in an actual increase in REE flux levels. We note that whistler mode chorus was enhanced in the May event and could also contribute to the acceleration of electrons.
Hwang Junga
Lee China
Lee Dae Young
Lee Ensang
Min Kyoung Wook
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