Proton aurora and substorm intensifications

Ground based measurements from the CANOPUS array of meridian scanning photometers and precipitating ion and electron data from the DMSP F9 satellite show that the electron arc which brightens to initiate substorms intensifications is formed within a region of intense proton precipitation that is wel...

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Veröffentlicht in:	Geophysical research letters 1992-11, Vol.19 (21), p.2167-2170
Hauptverfasser:	Samson, J. C., Lyons, L. R., Newell, P. T., Creutzberg, F., Xu, B.
Format:	Artikel
Sprache:	eng
Schlagworte:	Amplification Arrays AURORAE Auroras Boundaries CHARGED-PARTICLE PRECIPITATION CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS Convection DMSP satellites EARTH ATMOSPHERE EARTH MAGNETOSPHERE Earth, ocean, space Equatorial regions Exact sciences and technology External geophysics GEOMAGNETIC FIELD Geophysics Grounds MAGNETIC FIELDS 661320 > Auroral, Ionospheric, & Magnetospheric Phenomena-- (1992-) MAGNETIC STORMS MAGNETOTAIL Particle precipitation Physics of the ionosphere PROTON PRECIPITATION
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Beschreibung
Zusammenfassung:	Ground based measurements from the CANOPUS array of meridian scanning photometers and precipitating ion and electron data from the DMSP F9 satellite show that the electron arc which brightens to initiate substorms intensifications is formed within a region of intense proton precipitation that is well equatorward (about 4-6 deg) of the nightside open-closed field line boundary. The precipitating protons are from a population that is energized via Earthward convection from the magnetotail into the dipolar region of the magnetosphere and may play an important role in the formation of the electron arcs leading to substorm intensifications on dipolelike field lines.
ISSN:	0094-8276 1944-8007
DOI:	10.1029/92GL02184