Radar observations of cleft dynamics

Details Radar observations of cleft dynamics Radar observations of cleft dynamics

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.3453f&link_type=abstract

Journal of Geophysical Research, vol. 85, July 1, 1980, p. 3453-3460.

Physics

2

Auroral Zones, F Region, Ionospheric Disturbances, Radio Probing, Interplanetary Magnetic Fields, Latitude, Polar Substorms, Radar Measurement, Vertical Distribution

Scientific paper

A continuous radar monitoring, during a six hour period which included an onset and recovery of global substorm activity, of an ionospheric density enhancement associated with the cleft is reported. Observations of the cleft showed a rapid equatorward excursion to 70 deg Lambda before occurrence of a major substorm intensification, continued location at low magnetic latitude during substorm expansion, and a poleward retreat to about 73.5 deg Lambda during substorm recovery in response to a northward turning of the IMF. Furthermore, the latitudinal width of the cleft density enhancement varied from less than 1 deg during the presubstorm equatorward motion to about 4 deg after substorm recovery.

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