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Energies of precipitating electrons during pulsating aurora events derived from ionosonde observations

1981; NRC Research Press; Volume: 59; Issue: 8 Linguagem: Inglês

10.1139/p81-141

1208-6045

J. W. MacDougall, J. Hofstee, J. A. Koehler,

Earthquake Detection and Analysis

The time-history of particle energies and fluxes associated with pulsating auroras in the morning sector is derived from ionosonde measurements. All the pulsating auroras studied showed a similar history with the pulsations occurring during a time interval of the order of an hour during which the average auroral Maxwellian characteristic energy stays relatively constant but the energy flux decreases progressively during the event. A possible explanation for this behaviour in terms of an injection of particles into a magnetospheric "bottle" near the midnight meridian and the progressive precipitation out of the bottle during the pulsating event is suggested.