Proton aurora and substorm intensifications

Details Proton aurora and substorm intensifications Proton aurora and substorm intensifications

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19.2167s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 19, no. 21, p. 2167-2170.

Physics

118

Auroral Arcs, Magnetic Storms, Proton Precipitation, Geomagnetic Tail, Proton Energy

Scientific paper

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.

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