Physics
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.217..295m&link_type=abstract
In ESA Achievements of the Intern. Magnetospheric Study (IMS) p 295-298 (SEE N85-24544 14-46)
Physics
Auroras, Electron Precipitation, Magnetic Storms, Proton Precipitation, Geomagnetic Pulsations, H Beta Line, International Magnetospheric Study, Nocturnal Variations
Scientific paper
A multichannel meridian scanning photometer system monitored electron and proton precipitation patterns over a range from 59 to 79 deg invariant latitude during the International Magnetospheric Study. The developments of auroral substorms, mostly occurring in the premidnight sector, are traced, showing characteristically H beta emissions equatorward of the electron aurora prior to substorm onset. At onset there is a brightening of H beta and a poleward expansion. Following most such auroral substorms, in the postmidnight sector the aurora spreads into diffuse, patchy forms and pulsations begin, often lasting until morning.
McEwen Don J.
Steele David P.
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