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Global distribution of whistler-mode chorus waves observed on the THEMIS spacecraft
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2009 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 36, no 9, L09104- p.Article in journal (Refereed) Published
Abstract [en]

Whistler mode chorus waves are receiving increased scientific attention due to their important roles in both acceleration and loss processes of radiation belt electrons. A new global survey of whistler-mode chorus waves is performed using magnetic field filter bank data from the THEMIS spacecraft with 5 probes in near-equatorial orbits. Our results confirm earlier analyses of the strong dependence of wave amplitudes on geomagnetic activity, confinement of nightside emissions to low magnetic latitudes, and extension of dayside emissions to high latitudes. An important new finding is the strong occurrence rate of chorus on the dayside at L > 7, where moderate dayside chorus is present > 10% of the time and can persist even during periods of low geomagnetic activity.

Place, publisher, year, edition, pages
2009. Vol. 36, no 9, L09104- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-148336DOI: 10.1029/2009GL037595ISI: 000265928800005OAI: oai:DiVA.org:uu-148336DiVA: diva2:402098
Available from: 2011-03-07 Created: 2011-03-04 Last updated: 2017-12-11Bibliographically approved

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Swedish Institute of Space Physics, Uppsala Division
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