Observations of magnetospheric bursts of high-energy protons and electrons at approximately 35 earth radii with Imp 7

Details Observations of magnetospheric bursts of high-energy protons and electrons at approximately 35 earth radii with Imp 7 Observations of magnetospheric bursts of high-energy protons and electrons at approximately 35 earth radii with Imp 7

May 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.2341s&link_type=abstract

Journal of Geophysical Research, vol. 81, May 1, 1976, p. 2341-2355.

Physics

53

Electron Energy, Energy Spectra, Magnetospheric Instability, Proton Energy, Satellite Observation, Bow Waves, Bursts, Geomagnetic Tail, Magnetohydrodynamic Waves, Magnetosheath, Shock Waves, Solar Wind

Scientific paper

Proton and electron bursts (above 0.29 MeV and above 0.22 MeV, respectively) in the vicinity of the magnetosphere are studied on the basis of a high-sensitivity experiment. Although the bursts are a permanent feature in the upstream solar wind, the range of observed intensities varies by at least 5 orders of magnitude, depending on magnetic activity. The bursts are typically associated with weak fluctuations in the interplanetary magnetic field, which suggests the presence of hydromagnetic waves. Burst are found in and about the magnetosheath, plasma sheet, and magnetotail boundary layer, and also outside the bow shock; however, they rarely appear at distances greater than 10 earth radii north or south of the neutral sheet. Dawn-dusk asymmetries are present in intensity but not necessarily in frequency of occurrence. Proton bursts are highly anisotropic upstream from the bow shock and in the magnetosheath, while electron bursts are anisotropic only in the upstream solar wind.

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