Computer Science – Sound
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.5597b&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 96, April 1, 1991, p. 5597-5617.
Computer Science
Sound
15
Auroral Zones, Geomagnetism, Magnetic Field Configurations, Magnetic Storms, Space Plasmas, Antarctic Regions, Balloon Sounding, Electron Precipitation, Rocket Sounding, Solar Terrestrial Interactions
Scientific paper
Observations at Siple Station and two other Antarctic sites of the movement of the dayside oval to L = 4 or less during the intense geomagnetic storm on December 19-20, 1980 are discussed. Siple Station was poleward of the auroral oval at the height of the event. This large expansion of the oval is consistent with the level of disturbance that was seen. Magnetograms suggest that a localized current system intensification was centered near local dawn during the event. The presence of a Ps 6 micropulsation event and the local time of the event suggests that this current was s driven system intensification. The occurrence of an unloading system substorm current wedge at an unusual local time cannot be ruled out, however. The electric field associated with the eastward electrojet during the recovery phase was much larger than normally found in the auroral zone. A prolonged subauroral ion drift event of unusual intensity was encountered during the storm's recovery phase.
Benbrook James R.
Bering Edgar A. III
Dudeney John R.
Haacke Robert
Lanzerotti Louis J.
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