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Observation of pulsating aurora signatures in cosmic noise absorption data

Grandin, M., Kero, A., Partamies, N., McKay, D., Whiter, Daniel, Kozlovsky, A. and Miyoshi, Y. (2017) Observation of pulsating aurora signatures in cosmic noise absorption data Geophysical Research Letters (doi:10.1002/2017GL073901).

Record type: Article


This study investigates the contribution of energetic (E > 30 keV) particle precipitation during a pulsating aurora event over Kilpisjärvi (L = 6.2) on 26 February 2014. It is based on the comparison of auroral blue-line emission (427.8 nm) data from an all-sky camera and cosmic noise absorption (CNA) data obtained from a multibeam experiment of the Kilpisjärvi Atmospheric Imaging Receiver Array (KAIRA) riometer. The data sets are compared for three KAIRA beams close to magnetic zenith. Results show a clear correlation between the measured CNA and the auroral blue-line emission during the event, for each beam. In addition, individual pulsations are observed for the first time in the cosmic noise absorption data measured by KAIRA and are found to be close-to-identical to the optical pulsations. This suggests that the modulation of electron precipitation during pulsating aurora takes place in a consistent way over a broad range of energies.

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Accepted/In Press date: 27 May 2017
e-pub ahead of print date: 12 June 2017
Organisations: Physics & Astronomy


Local EPrints ID: 411002
ISSN: 1944-8007
PURE UUID: a02fac90-4ac0-4bd5-b73e-5257990caf73
ORCID for Daniel Whiter: ORCID iD

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Date deposited: 13 Jun 2017 16:31
Last modified: 07 Sep 2017 16:34

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Author: M. Grandin
Author: A. Kero
Author: N. Partamies
Author: D. McKay
Author: Daniel Whiter ORCID iD
Author: A. Kozlovsky
Author: Y. Miyoshi

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