University of Oulu

Ozaki, M., Miyoshi, Y., Shiokawa, K., Hosokawa, K., Oyama, S., Kataoka, R., Ebihara, Y., Ogawa, Y., Kasahara, Y., Yagitani, S., Kasaba, Y., Kumamoto, A., Tsuchiya, F., Matsuda, S., Katoh, Y., Hikishima, M., Kurita, S., Otsuka, Y., Moore, R., Tanaka, Y., Nosé, M., Nagatsuma, T., Nishitani, N., Kadokura, A., Connors, M., Inoue, T., Matsuoka, A., Shinohara, I. (2019) Visualization of rapid electron precipitation via chorus element wave–particle interactions. Nature communications, 10(1), 257. doi:10.1038/s41467-018-07996-z

Visualization of rapid electron precipitation via chorus element wave-particle interactions

Saved in:
Author: Ozaki, Mitsunori1; Miyoshi, Yoshizumi2; Shiokawa, Kazuo2;
Organizations: 1Kanazawa Univ, Grad Sch Nat Sci & Technol, Kakuma Machi, Kanazawa, Ishikawa 9201192, Japan.
2Nagoya Univ, Inst Space Earth Environm Res, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648601, Japan.
3Univ Electrocommun, Grad Sch Informat & Engn, 1-5-1 Chofugaoka, Chofu, Tokyo 1828585, Japan.
4Univ Oulu, Ionosphere Res Unit, Oulu, Finland.
5Natl Inst Polar Res, 10-3 Midori Cho, Tachikawa, Tokyo 1908518, Japan.
6Grad Univ Adv Studies SOKENDAI, 10-3 Midori Cho, Tachikawa, Tokyo 1908518, Japan.
7Kyoto Univ, Res Inst Sustainable Humanosphere, Uji, Kyoto 6110011, Japan.
8Tohoku Univ, Grad Sch Sci, Aoba Ku, 6-3 Aramaki Aza Aoba, Sendai, Miyagi 9808578, Japan.
9Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuo Ku, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2525210, Japan.
10Univ Florida, Dept Elect & Comp Engn, Gainesville, FL 32611 USA.
11Res Org Informat & Syst, Joint Support Ctr Data Sci Res, 10-3 Midori Cho, Tachikawa, Tokyo 1900014, Japan.
12Natl Inst Informat & Commun Technol, 4-2-1 Nukui Kitamachi, Koganei, Tokyo 1848795, Japan.
13Athabasca Univ, Ctr Sci, 1 Univ Dr, Athabasca, AB T9S 3A3, Canada.
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 4.1 MB)
Persistent link:
Language: English
Published: Springer Nature, 2019
Publish Date: 2019-10-29


Chorus waves, among the most intense electromagnetic emissions in the Earth’s magnetosphere, magnetized planets, and laboratory plasmas, play an important role in the acceleration and loss of energetic electrons in the plasma universe through resonant interactions with electrons. However, the spatial evolution of the electron resonant interactions with electromagnetic waves remains poorly understood owing to imaging difficulties. Here we provide a compelling visualization of chorus element wave–particle interactions in the Earth’s magnetosphere. Through in-situ measurements of chorus waveforms with the Arase satellite and transient auroral flashes from electron precipitation events as detected by 100-Hz video sampling from the ground, Earth’s aurora becomes a display for the resonant interactions. Our observations capture an asymmetric spatial development, correlated strongly with the amplitude variation of discrete chorus elements. This finding is not theoretically predicted but helps in understanding the rapid scattering processes of energetic electrons near the Earth and other magnetized planets.

see all

Series: Nature communications
ISSN: 2041-1723
ISSN-E: 2041-1723
ISSN-L: 2041-1723
Volume: 10
Article number: 257
DOI: 10.1038/s41467-018-07996-z
Type of Publication: A1 Journal article – refereed
Field of Science: 115 Astronomy and space science
Funding: The present study was supported by JSPS KAKENHI JP15H05747, JP15H05815, JP16H06286, JP16H04056, JP17H06140, and JP17K06456 and by Kanazawa University SAKIGAKE project. The authors would like to thank Marty Karjala of the University of Alaska Fairbanks (UAF) for his careful support with the EMCCD optical observations at Gakona. The database construction for the PWING ground-based instruments is partly supported by the IUGONET (Inter-university Upper atmosphere Global Observation NETwork) project ( The authors would also like to extend sincere thanks to all members of the ERG project, the PWING project, and the ERG Science Center. This work was carried out by the joint research program of the Institute for Space–Earth Environmental Research (ISEE), Nagoya University.
Copyright information: © The Author(s) 2019. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit