Magnetic Storm‐Time Red Aurora as Seen From Hokkaido, Japan on 1 December 2023 Associated With High‐Density Solar Wind
Abstract We report a citizen science‐motivated study on the cause of an unusually bright red aurora as witnessed from Hokkaido, Japan during a magnetic storm on 1 December 2023. The auroral brightness of 5 kR is unusual for the Dst index peak of only −107 nT. In spite of the moderate storm amplitude...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2024-06-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL108778 |
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| _version_ | 1849321888417841152 |
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| author | Ryuho Kataoka Yoshizumi Miyoshi Kazuo Shiokawa Nozomu Nishitani Kunihiro Keika Takanobu Amano Kanako Seki |
| author_facet | Ryuho Kataoka Yoshizumi Miyoshi Kazuo Shiokawa Nozomu Nishitani Kunihiro Keika Takanobu Amano Kanako Seki |
| author_sort | Ryuho Kataoka |
| collection | DOAJ |
| description | Abstract We report a citizen science‐motivated study on the cause of an unusually bright red aurora as witnessed from Hokkaido, Japan during a magnetic storm on 1 December 2023. The auroral brightness of 5 kR is unusual for the Dst index peak of only −107 nT. In spite of the moderate storm amplitude, the extremely high solar wind density of >50/cc and dynamic pressure of >25 nPa caused the aurora oval extension to 53 magnetic latitudes (L = 2.8). We discuss that the drift loss of the ring current particles across the small‐size magnetopause is important, and Hokkaido was at the right position to see the direct effect of the large particle injection of the storm‐time substorm. |
| format | Article |
| id | doaj-art-90f6c755cdeb46d49c2120bca5ed5c96 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-90f6c755cdeb46d49c2120bca5ed5c962025-08-20T03:49:37ZengWileyGeophysical Research Letters0094-82761944-80072024-06-015112n/an/a10.1029/2024GL108778Magnetic Storm‐Time Red Aurora as Seen From Hokkaido, Japan on 1 December 2023 Associated With High‐Density Solar WindRyuho Kataoka0Yoshizumi Miyoshi1Kazuo Shiokawa2Nozomu Nishitani3Kunihiro Keika4Takanobu Amano5Kanako Seki6National Institute of Polar Research Tachikawa JapanISEE Nagoya University Nagoya JapanISEE Nagoya University Nagoya JapanISEE Nagoya University Nagoya JapanGraduate School of Science University of Tokyo Tokyo JapanGraduate School of Science University of Tokyo Tokyo JapanGraduate School of Science University of Tokyo Tokyo JapanAbstract We report a citizen science‐motivated study on the cause of an unusually bright red aurora as witnessed from Hokkaido, Japan during a magnetic storm on 1 December 2023. The auroral brightness of 5 kR is unusual for the Dst index peak of only −107 nT. In spite of the moderate storm amplitude, the extremely high solar wind density of >50/cc and dynamic pressure of >25 nPa caused the aurora oval extension to 53 magnetic latitudes (L = 2.8). We discuss that the drift loss of the ring current particles across the small‐size magnetopause is important, and Hokkaido was at the right position to see the direct effect of the large particle injection of the storm‐time substorm.https://doi.org/10.1029/2024GL108778magnetic stormauroracitizen scienceinterplanetary shock |
| spellingShingle | Ryuho Kataoka Yoshizumi Miyoshi Kazuo Shiokawa Nozomu Nishitani Kunihiro Keika Takanobu Amano Kanako Seki Magnetic Storm‐Time Red Aurora as Seen From Hokkaido, Japan on 1 December 2023 Associated With High‐Density Solar Wind Geophysical Research Letters magnetic storm aurora citizen science interplanetary shock |
| title | Magnetic Storm‐Time Red Aurora as Seen From Hokkaido, Japan on 1 December 2023 Associated With High‐Density Solar Wind |
| title_full | Magnetic Storm‐Time Red Aurora as Seen From Hokkaido, Japan on 1 December 2023 Associated With High‐Density Solar Wind |
| title_fullStr | Magnetic Storm‐Time Red Aurora as Seen From Hokkaido, Japan on 1 December 2023 Associated With High‐Density Solar Wind |
| title_full_unstemmed | Magnetic Storm‐Time Red Aurora as Seen From Hokkaido, Japan on 1 December 2023 Associated With High‐Density Solar Wind |
| title_short | Magnetic Storm‐Time Red Aurora as Seen From Hokkaido, Japan on 1 December 2023 Associated With High‐Density Solar Wind |
| title_sort | magnetic storm time red aurora as seen from hokkaido japan on 1 december 2023 associated with high density solar wind |
| topic | magnetic storm aurora citizen science interplanetary shock |
| url | https://doi.org/10.1029/2024GL108778 |
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