Small-scale structure of intense field-aligned currents at high latitudes

Details Small-scale structure of intense field-aligned currents at high latitudes Small-scale structure of intense field-aligned currents at high latitudes

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984kosis..22..749v&link_type=abstract

Kosmicheskie Issledovaniia (ISSN 0023-4206), vol. 22, Sept.-Oct. 1984, p. 749-755. In Russian.

Physics

1

Auroral Zones, Field Aligned Currents, Intercosmos Satellites, Ionospheric Currents, Magnetospheric Instability, Current Density, Magnetic Disturbances, Magnetic Measurement, Magnetohydrodynamic Waves, Standing Waves

Scientific paper

An investigation is made of the small-scale structure of field-aligned currents, detected in the auroral oval using magnetic measurements from the Intercosmos-Bulgaria 1300 satellite. The characteristic transverse size of the currents ranges from 2 to 8 km and the density ranges from 0.00003 to 0.0001 A/sq m. It is shown that some of the current structures correspond to a system of 'standing' Alfven waves, evidently excited by the magnetospheric-convection instability. The size of the structure along the geomagnetic field and the magnitude of anomalous resistance are determined.

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