Penetration of polar electric fields to the nightside dip equator at times of geomagnetic sudden commencements
Journal Article
·
· Journal of Geophysical Research
The authors report on doppler velocity measurements made on vertical plasma drifts observed during two sudden commencement events in the afternoon sector. The F region plasma drift downward was observed to minimize, and for one event even reverse, during the preliminary impulse phase of the sudden commencement, before the main impulse arrived, driving strong downward drift. These observations are the first direct observation of vertical plasma motion in conjunction with sudden commencement events. The effects on vertical plasma drift are consistent with models which predict dusk-to-dawn electric field enhancements during the preliminary impulse phase of the sudden commencement.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 75635
- Journal Information:
- Journal of Geophysical Research, Journal Name: Journal of Geophysical Research Journal Issue: A10 Vol. 98; ISSN JGREA2; ISSN 0148-0227
- Country of Publication:
- United States
- Language:
- English
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