Ground-based observations of an isolated substorm

Details Ground-based observations of an isolated substorm Ground-based observations of an isolated substorm

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980p%26ss...28..763t&link_type=abstract

Planetary and Space Science, vol. 28, July 1980, p. 763-779. Research supported by the Deutsche Forschungsgemeinschaft.

Physics

Ionospheric Currents, Ionospheric Disturbances, Magnetic Storms, Magnetospheric Instability, Polar Substorms, All Sky Photography, Current Density, Field Aligned Currents, Ionospheric Conductivity, Magnetometers, Radar Measurement

Scientific paper

An isolated substorm occurred in Northern Scandinavia on March 1, 1977 around magnetic midnight. The ionospheric phenomena associated with this substorm were studied by ground magnetometers, the Scandinavian Twin Auroral Radar Experiment, riometers and an all-sky camera. The physical properties of the auroral electrojet are determined from the ground magnetic field and the ionospheric electric field data. Low and midlatitude magnetic field data show evidence of field-aligned current flow. It is shown that the enhancement of the electrojet's current density is essentially determined by an increase in the ionospheric conductivity. The current system derived from the data of this study corresponds to a model of Yasuhara et al. (1975).

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