Local time occurrence frequency of energetic ions in the earth's magnetosheath

Details Local time occurrence frequency of energetic ions in the earth's magnetosheath Local time occurrence frequency of energetic ions in the earth's magnetosheath

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20..551f&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 7, p. 551-554.

Mathematics

Probability

4

Bow Waves, Energetic Particles, Magnetosheath, Magnetospheric Ion Density, Shock Waves, Diurnal Variations, Interplanetary Magnetic Fields, Ion Distribution, Ion Motion, Solar Terrestrial Interactions

Scientific paper

The occurrence frequency of energetic ions in the energy range from 8 to 40 keV/e as a function of local time in the magnetosheath is presented. Energetic ions are observed in the magnetosheath with a minimum probability of 25 percent for all local times. The occurrence frequency for the energetic ions is higher on the dawnside than on the duskside but shows a relative maximum postnoon in the local time range from 12 to 15 hours. The postnoon relative maximum is attributed to a magnetospheric source for the energetic ions while the dawn-dusk asymmetry is attributed to a quasi-parallel bow shock source.

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