2024-03-29T13:58:43Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00027236
2023-01-16T04:45:27Z
879:880:881
Purple Auroral Rays and Global Pc1 Pulsations Observed at the CIR-Associated Solar Wind Density Enhancement on 21 March 2017
Shiokawa, K.
Ozaki, M.
Kadokura, A.
Endo, Y.
Sakanoi, T.
Kurita, S.
Miyoshi, Y.
Oyama, S.-I.
Connors, M.
Schofield, I.
Ruohoniemi, J. M.
Nośe, M.
Nagatsuma, T.
Sakaguchi, K.
Baishev, D. G.
Pashinin, A.
Rakhmatulin, R.
Shevtsov, B.
Poddelsky, I.
Engebretson, M.
Raita, Tero
Tanaka, Y.-M.
Shinohara, M.
Teramoto, M.
Nomura, R.
Fujimoto, A.
Matsuoka, A.
Higashio, N.
Takashima, T.
Shinohara, I.
Albert, Jay M.
open access
© 2018 American Geophysical Union
purple aurora
Pc1 pulsation
CIR storm
PWING project
Arase satellite
EMIC wave
This paper reports two unique auroral features: postmidnight purple auroral rays and global Pc1 geomagnetic pulsations, observed before the onset of the corotating interaction region (CIR) storm of 21 March 2017, at the beginning of the first campaign of the new Particles and Waves in the Inner magnetosphere using Ground‐based network observation (PWING) longitudinal ground network with the Arase satellite. The purple auroral rays were observed from ~0315 to 0430 UT (~03–04 magnetic local time) in the northeastern sky at Husafell, Iceland (magnetic latitude: 64.9°N). We newly propose that the entry of high‐density CIR plasma into the magnetotail created purple auroral rays in the sunlit ionosphere. Pc1 geomagnetic pulsations at frequencies of 0–0.5 Hz were observed after ~00 UT over a wide local time range, of 13 hr, from midnight to afternoon sectors at subauroral latitudes associated with CIR arrival. These results indicate preconditioning of the magnetosphere due to crossing of a CIR.
ファイル公開:2019-04-28
Wiley
2018-04-28
eng
journal article
VoR
http://hdl.handle.net/2237/00029435
https://nagoya.repo.nii.ac.jp/records/27236
https://doi.org/10.1029/2018GL079103
0094-8276
1944-8007
Geophysical Research Letters
45
20
10,819
10,828
https://nagoya.repo.nii.ac.jp/record/27236/files/Shiokawa_et_al-2018-Geophysical_Research_Letters.pdf
application/pdf
2.1 MB
2019-04-28