First medium energy neutral atom (MENA) Images of Earth's magnetosphere during substorm and storm-time
Abstract
Initial ENA images obtained with the MENA imager on the IMAGE observatory show that ENAs emanating from Earth’s magnetosphere at least crudely track both Dst and Kp. Images obtained during the storm of August 12, 2000, clearly show strong ring current asymmetry during storm main phase and early recovery phase, and a high degree of symmetry during the late recovery phase. Thus, these images establish the existence of both partial and complete ring currents during the same storm. Further, they suggest that ring current loss through the day side magnetopause dominates other loss processes during storm main phase and early recovery phase.
- Publication:
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Geophysical Research Letters
- Pub Date:
- March 2001
- DOI:
- 10.1029/2000GL012641
- Bibcode:
- 2001GeoRL..28.1147P
- Keywords:
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- Magnetospheric Physics;
- Magnetospheric Physics: Ring current;
- Magnetospheric Physics: Storms and substorms;
- Magnetospheric Physics: Instruments and techniques