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Observation of low frequency electromagnetic activity at 1000 km altitude
KTH, Superseded Departments, Alfvén Laboratory.ORCID iD: 0000-0003-2422-5426
KTH, Superseded Departments, Alfvén Laboratory.
2001 (English)In: Annales Geophysicae, ISSN 0992-7689, E-ISSN 1432-0576, Vol. 19, no 6, 643-648 p.Article in journal (Refereed) Published
Abstract [en]

We present a statistical study of low frequency fluctuations of electric and magnetic fields, commonly interpreted as Alfvenic activity. The data base consists of six months of electric and magnetic field measurements by the Astrid-2 microsatellite. The occurrence of the events is studied with respect to the location and general activity. Large regions of broadband Alfvenic activity are persistently observed in the cusp/cleft and, during the periods of high geomagnetic activity, also in the pre-midnight sector of the auroral oval.

Place, publisher, year, edition, pages
2001. Vol. 19, no 6, 643-648 p.
Keyword [en]
ionosphere, auroral ionosphere, space plasma physics, waves and instabilities, magnetospheric physics, magnetosphere-ionosphere interactions, ALFVEN WAVES, AURORAL ARC
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-13438DOI: 10.5194/angeo-19-643-2001ISI: 000169921400007OAI: oai:DiVA.org:kth-13438DiVA: diva2:325339
Note
QC 20100618Available from: 2010-06-18 Created: 2010-06-18 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Alfven Waves and Spatio-Temporal Structuring in the Auroral Ionosphere
Open this publication in new window or tab >>Alfven Waves and Spatio-Temporal Structuring in the Auroral Ionosphere
2002 (English)Doctoral thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH, 2002. x, 41 p.
Keyword
dispersive alfrén waves, auroral particle acceleration, ionospheric alfvén resonator, auroral particle acceleration, small scale auroral structure
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-3364 (URN)
Public defence
2002-06-07, 00:00
Note
QC 20100618Available from: 2002-06-05 Created: 2002-06-05 Last updated: 2010-06-18Bibliographically approved

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