Physics
Scientific paper
Aug 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975p%26ss...23.1129o&link_type=abstract
Planetary and Space Science, vol. 23, Aug. 1975, p. 1129-1139. Research supported by the National Research Council of Canada.
Physics
16
Auroral Electrojets, Geomagnetic Pulsations, Polar Substorms, Amplitudes, Geomagnetic Latitude, Magnetic Signatures, Power Spectra, Waveforms
Scientific paper
Measurements of the properties of Pi 2 pulsations along a magnetic meridian at high latitudes during a number of substorms have been analyzed for their relationship to the auroral electrojet. It is found that the maximum Pi 2 pulsation amplitudes are closely associated with the instantaneous position of the electrojet. That is, the average pulsation amplitude in the Pi 2 band as well as the amplitudes of pulsations at specific frequencies in the band have maximum amplitudes at latitudes close to the instantaneous electrojet location. Stations equatorward of the electrojet tend to observe a classical Pi 2 waveform concurrent with the onset of the substorm electrojet. Stations near the electrojet observe a broad spectrum of pulsations indicating a multiplicity of sources. Stations poleward of the initial electrojet position see little pulsation activity until the electrojet moves overhead.
Olson John V.
Rostoker Gordon
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