Magnetic Storm-Time Red Aurora as Seen From Hokkaido, Japan on 1 December 2023 Associated With High-Density Solar Wind

被引：4
作者：
Kataoka, Ryuho [1 ,2 ,3 ]
Miyoshi, Yoshizumi [4 ]
Shiokawa, Kazuo [4 ]
Nishitani, Nozomu [4 ]
Keika, Kunihiro [3 ]
Amano, Takanobu [3 ]
Seki, Kanako [3 ]
机构：
[1] Natl Inst Polar Res, Tachikawa, Japan
[2] SOKENDAI, Hayama, Japan
[3] Univ Tokyo, Grad Sch Sci, Tokyo, Japan
[4] Nagoya Univ, ISEE, Nagoya, Japan
来源：
GEOPHYSICAL RESEARCH LETTERS | 2024年 / 51卷 / 12期
基金：
日本学术振兴会;
关键词：
magnetic storm; aurora; citizen science; interplanetary shock; DMSP SATELLITES;
D O I：
10.1029/2024GL108778
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
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.
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页数：8
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