Dependence of Pc5 micropulsation power on conductivity variations in the morning sector

Details Dependence of Pc5 micropulsation power on conductivity variations in the morning sector Dependence of Pc5 micropulsation power on conductivity variations in the morning sector

May 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27..631s&link_type=abstract

Planetary and Space Science, vol. 27, May 1979, p. 631-642. Research supported by the National Research Council of Canada.

Physics

Auroral Electrojets, Geomagnetic Micropulsations, Ionospheric Conductivity, Morning, Daytime, Earth Magnetosphere, Night Sky, Plasma Oscillations, Sonograms, Winter

Scientific paper

Data from two magnetometers in the East-West line show that power in the Pc5 micropulsation range is markedly enhanced as one moves across the dawn terminator at 100 km from the nightside to the dayside. A significant increase of pulsation strength at about 0730 LT favors the concept that Pc5 micropulsations can be viewed as oscillations of a three-dimensional current loop involving downward current in the prenoon sector diverging to flow in the ionosphere as part of the westward auroral electrojet and returning to the magnetosphere along field lines penetrating the ionosphere across the region which separates the dark and sunlit ionosphere.

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