Observation of dayside subauroral proton flashes with the IMAGE-FUV imagers

Magnetospheric Physics: Auroral phenomena (2407); Magnetospheric Physics: Solar wind/magnetosphere interactions; precipitating; Magnetospheric Physics: Energetic particles

Abstract :

[en] [1] A detailed description of an intense flash of auroral emissions that occurs equatorward of the dayside auroral oval observed with the IMAGE-FUV imagers is presented. The comparison of simultaneous snapshots of this subauroral flash obtained with the three FUV cameras indicates that proton precipitation is dominant. This transient proton aurora is triggered by the sudden increase of a solar wind dynamic pressure pulse. It occurs on closed field lines mapping to the equatorial plane at distances as small as similar to4 RE. A second similar event is presented, and several other cases are mentioned. These shock induced transcient emissions develop with a time scale of a few minutes (typically similar to5 min), and have a relaxation time on the order of similar to10 minutes.

Disciplines :

Physical, chemical, mathematical & earth Sciences: Multidisciplinary, general & others

Author, co-author :

Hubert, Benoît ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)

Gérard, Jean-Claude ; Université de Liège - ULiège > Département d'astrophys.

Fuselier, S. A.

Mende, S. B.

Language :

English

Title :

Observation of dayside subauroral proton flashes with the IMAGE-FUV imagers

Publication date :

14 February 2003

Journal title :

Geophysical Research Letters

ISSN :

0094-8276

eISSN :

1944-8007

Publisher :

American Geophysical Union, Washington, United States - District of Columbia

Volume :

Issue :

Pages :

45-1

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://adsabs.harvard.edu/abs/2003GeoRL..30c..45H

Available on ORBi :

since 30 November 2009

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