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

Journal Article · Fri Apr 09 04:00:00 EDT 1993 · Geophysical Research Letters (American Geophysical Union); (United States)

DOI:https://doi.org/10.1029/93GL00807· OSTI ID:6522527

Fuselier, S A ^[1]; Hill, P; Baumjohann, W ^[2]; Gosling, J T ^[3]

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1. Lockheed Palo Alto Research Lab., CA (United States)
2. Max Planck Institut fuer Extraterrestrische Physik, Garching (Germany)
3. Los Alamos National Lab., NM (United States)

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% 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 post-noon in the local time range from 12 to 15 hours. The post-noon 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. 13 refs., 3 figs.

• OSTI ID: 6522527
• Journal Information: Geophysical Research Letters (American Geophysical Union); (United States), Journal Name: Geophysical Research Letters (American Geophysical Union); (United States) Vol. 20:7; ISSN GPRLAJ; ISSN 0094-8276
• Country of Publication: United States
• Language: English

Related Subjects

661320* -- Auroral
Ionospheric
& Magnetospheric Phenomena-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASYMMETRY
CHARGED PARTICLES
ENERGY DENSITY
ENERGY RANGE
HOURLY VARIATIONS
ION DENSITY
IONS
KEV RANGE
KEV RANGE 01-10
KEV RANGE 10-100
MAGNETOSHEATH
VARIATIONS