University of Oulu

Kawamura, M., Sakanoi, T., Fukizawa, M., Miyoshi, Y., Hosokawa, K., Tsuchiya, F., et al. (2021). Simultaneous pulsating aurora and microburst observations with ground-based fast auroral imagers and CubeSat FIREBIRD-II. Geophysical Research Letters, 48, e2021GL094494.

Simultaneous pulsating aurora and microburst observations with ground-based fast auroral imagers and CubeSat FIREBIRD-II

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Author: Kawamura, Miki1; Sakanoi, Takeshi1; Fukizawa, Mizuki1;
Organizations: 1Graduate School of Science, Tohoku University, Sendai, Japan
2Institute for Space-Earth Environmental Research Nagoya University, Nagoya, Japan
3The University of Electro-Communications, Chofu, Japan
4National Institute of Polar Research, Tachikawa, Japan
5The Graduate University for Advanced Studies (SOKENDAI), Tachikawa, Japan
6Joint Support-Center for Data Science Research, Research Organization of Information and Systems, Tachikawa, Japan
7Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
8NICT, Koganei, Japan
9Department of Physics, University of New Hampshire, Durham, NH, USA
10Department of Physics, Montana State University, Bozeman, MT, USA
11University of Oulu, Oulu, Finland
12Swedish Institute of Space Physics, Kiruna, Sweden
Format: article
Version: published version
Access: open
Persistent link:
Language: English
Published: American Geophysical Union, 2021
Publish Date: 2022-03-24


We report on the relationship between a pulsating aurora and a relativistic electron microburst using simultaneous observations of ground-based fast auroral imagers with the FIREBIRD-Ⅱ CubeSat for the first time. We conducted a detailed analysis of an event on October 8, 2018 and found that the occurrence of the pulsating aurora with internal modulations corresponds to the flux enhancement of electrons with energy ranging from ∼220 keV to >1 MeV detected with Flight Unit 4, one of FIREBIRD’s CubeSat, with a time delay of ∼585 ms. Combining of this time delay result and time of flight model, we suggest that the pulsating aurora and the microburst occur simultaneously due to the chorus waves at different latitudes along the same field-line as predicted by Miyoshi et al. (2020,

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Series: Geophysical research letters
ISSN: 0094-8276
ISSN-E: 1944-8007
ISSN-L: 0094-8276
Volume: 48
Issue: 18
Article number: e2021GL094494
DOI: 10.1029/2021GL094494
Type of Publication: A1 Journal article – refereed
Field of Science: 115 Astronomy and space science
Funding: This work has been supported by JSPS KAKENHI JP 15H05747, 16H06286, 18H03727, 20H01959, 20H01955, and 21H04526. The operation of the EMCCD camera at Sodankylä has been supported by Sodankylä Geophysical Observatory (SGO). The operation of the EMCCD camera at Tjautjas has been supported by Swedish Institute of Space Physics (IRF). FIREBIRD data was made possible by the National Science Foundation grant numbers: 0838034, 1339414.
Copyright information: © 2021. American Geophysical Union. All Rights Reserved.