University of Oulu

Elliott, S. S., Breneman, A. W., Colpitts, C., Pettit, J. M., Cattell, C. A., Halford, A. J., et al. (2022). Quantifying the size and duration of a microburst-producing chorus region on 5 December 2017. Geophysical Research Letters, 49, e2022GL099655.

Quantifying the size and duration of a microburst-producing chorus region on 5 December 2017

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Author: Elliott, S. S.1; Breneman, A. W.2; Colpitts, C.1;
Organizations: 1The University of Minnesota, Minneapolis, MN, USA
2NASA Goddard Space Flight Center, Greenbelt, MD, USA
3University of Colorado LASP, Boulder, CO, USA
4Montana State University, Bozeman, MT, USA
5ISEE, Nagoya University, Nagoya, Japan
6Kanazawa University, Kanazawa, Japan
7University of Calgary, Calgary, AB, Canada
8ISAS/JAXA, Sagamihara, Japan
9Athabasca University, Athabasca, AB, Canada
10Sodankylä Geophysical Observatory, University of Oulu, Sodankylä, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 3.4 MB)
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Language: English
Published: American Geophysical Union, 2022
Publish Date: 2022-09-27


Microbursts are impulsive (<1 s) injections of electrons into the atmosphere, thought to be caused by nonlinear scattering by chorus waves. Although attempts have been made to quantify their contribution to outer belt electron loss, the uncertainty in the overall size and duration of the microburst region is typically large, so that their contribution to outer belt loss is uncertain. We combine datasets that measure chorus waves (Van Allen Probes [RBSP], Arase, ground-based VLF stations) and microburst (>30 keV) precipitation (FIREBIRD II and AC6 CubeSats, POES) to determine the size of the microburst-producing chorus source region beginning on 5 December 2017. We estimate that the long-lasting (∼30 hr) microburst-producing chorus region extends from 4 to 8 ΔMLT and 2–5 ΔL. We conclude that microbursts likely represent a major loss source of outer radiation belt electrons for this event.

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Series: Geophysical research letters
ISSN: 0094-8276
ISSN-E: 1944-8007
ISSN-L: 0094-8276
Volume: 49
Issue: 15
Article number: e2022GL099655
DOI: 10.1029/2022gl099655
Type of Publication: A1 Journal article – refereed
Field of Science: 115 Astronomy and space science
Funding: Work at the University of Minnesota and NASA Goddard was supported by the NASA Heliophysics Supporting Research program NNH18ZDA001N-HSR award 80NSSC19K0842. The authors would like to acknowledge Jeremy Faden and the use of Autoplot. The authors would like to thank George Hospodarsky for providing EMFISIS wave normal angle data. JMP acknowledge funding from the NSF Coupling, Energetics and Dynamics of Atmospheric Regions, grant AGS 1651428 and the NASA Living With a Star program, grant NNX14AH54G.
Copyright information: © 2022. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.