Polar cusp electron during quiet and disturbed period

概要

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On the basis of DMSP electron data obtained in both hemispheres, the characteristics of the dayside cusp electron precipitation are examined during quiet and disturbed geomagnetic activity periods. It is found that the latitudinal width of cusp region defined by precipitating electrons is very narrow (1-2°) during disturbed periods and very wide (∿5°) during quiet periods. It was also found that the cusp like precipitation could be seen even in the late evening sector in the quiet period suggesting the longitudinally extended cusp. On the other hand, the cusp was confined in the narrow local time during disturbed periods. All these features are seen nearly simultaneously in both hemispheres, showing a north-south hemispheric conjugacy.
国立極地研究所の論文