The role of ring current nose events in producing stable auroral red arc intensifications during the main phase - Observations during the September 19-24, 1984, equinox transition study

Details The role of ring current nose events in producing stable auroral red arc intensifications during the main phase - Observations during the September 19-24, 1984, equinox transition study The role of ring current nose events in producing stable auroral red arc intensifications during the main phase - Observations during the September 19-24, 1984, equinox transition study

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.9267k&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A6, p. 9267-9283.

Physics

14

Auroral Arcs, Ionospheric Noise, Magnetic Disturbances, Red Arcs, Ring Currents, Equinoxes, Magnetospheric Instability, Synthetic Aperture Radar

Scientific paper

A set of observations describing ionospheric conditions, magnetospheric populations, and 6300-A emission intensities on stable auroral red (SAR) arc field lines during the solar minimum 19-24 Sept. 1984 magnetic storm period prompted a study of solar cycle and magnetic storm phase variations in SAR arc emissions and their magnetospheric energy source. It was found that medium-energy H(+) was significantly enhanced during the main phase compared to the late recovery phase of the 19-20 Sept. 1984 storm. Enhanced heating of the thermal electron plasma caused by this population resulted in more than an order of magnitude greater SAR arc emissions in the main phase compared to the recovery phase. O(+) was found to be the dominant energy source for SAR arcs in the late recovery phases of storms in the 19-24 Sept. period.

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