Japan Geoscience Union Meeting 2022

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[E] Oral

P (Space and Planetary Sciences ) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM10] Dynamics of Magnetosphere and Ionosphere

Thu. May 26, 2022 3:30 PM - 5:00 PM 303 (International Conference Hall, Makuhari Messe)

convener:Yuka Sato(Nippon Institute of Technology), convener:Akimasa Ieda(Institute for Space-Earth Environmental Research, Nagoya University), Akiko Fujimoto(Kyushu Institute of Technology), convener:Shun Imajo(Data Analysis Center for Geomagnetism and Space Magnetism, Graduate School of Science, Kyoto University), Chairperson:Yoshimasa Tanaka(National Institute of Polar Research), Naritoshi Kitamura(Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo)


3:45 PM - 4:00 PM

[PEM10-18] SuperDARN observation of sub-auroral flows associated with Stable Auroral Red Arc structure during the 4 Nov 2021 storm event

*Nozomu Nishitani1, Tomoaki Hori1, Kazuo Shiokawa1, Yuichi Otsuka1, Boris Shevtsov2, Sergey Y. Khomutov2 (1.Institute for Space-Earth Environmental Research, Nagoya University, 2.Institute of Cosmophysical Research and Radiowave Propagation (IKIR), Far Eastern Branch of the Russian Academy of Sciences)

Keywords:Mid-latitude SuperDARN, storm, SAPS, SAR arc

During the 4 Nov 2021 storm event (minimum Dst=-105 nT at 14 UT), the Stable Auroral Red (SAR) arc structure was observed by the all-sky imager at Paratunka, Russia. The SuperDARN Hokkaido Pair of (HOP) radars, consisting of Hokkaido East (HOK) and Hokkaido West (HKW) radars and covering the field of view of the Paratunka all-sky imager, observed SAPS type westward oriented flows in association with the SAR arc. Both the arc and the flow were observed from 8 to 15 UT (evening to premidnight sector), and were located close to each other with equatorward expansion with time. In addition, smaller-scale structures, both in time and in space, seem to be highly correlated as well. These characteristics suggest a strong link between the SAR arc activity and ionospheric convective flows. More details of the comparison results and the discussion of the possible interpretation will be presented.