Plasma waves causing 20 Hz intensity modulation of pulsating aurora

Herbert Akihito Uchida; Ryuho Kataoka; Kiyoka Murase; Shoya Matsuda; Yoshiya Kasahara; Masafumi Shoji; Yoshizumi Miyoshi; Iku Shinohara; Ayako Matsuoka; Satoshi Kurita; Keisuke Hosokawa

Presentation information

[E] Poster

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

[P-EM13] Dynamics of Magnetosphere and Ionosphere

convener:Aoi Nakamizo(Applied Electromagnetic Research Institute, National Institute of Information and Communications Technology), Mitsunori Ozaki(Faculty of Electrical and Computer Engineering, Institute of Science and Engineering, Kanazawa University), Akiko Fujimoto(Kyushu Institute of Technology), Yuka Sato(Nippon Institute of Technology)

[PEM13-P06] Plasma waves causing 20 Hz intensity modulation of pulsating aurora

*Herbert Akihito Uchida¹, Ryuho Kataoka^2,1, Kiyoka Murase¹, Shoya Matsuda³, Yoshiya Kasahara⁴, Masafumi Shoji⁵, Yoshizumi Miyoshi⁵, Iku Shinohara³, Ayako Matsuoka³, Satoshi Kurita⁵, Keisuke Hosokawa⁶ (1.The Graduate University for Advanced Studies, 2.National Institute of Polar Research, 3.Institute of Space and Astronautical Science, 4.Kanazawa University, 5.Institute for Space–Earth Environmental Research, 6.The University of Electro-Communications)

Keywords:Pulsating aurora, Chorus waves, Fast modulation

We observed ~20 Hz intensity modulation of pulsating aurora at Syowa Station by high-speed camera pointing at magnetic zenith for a few min time interval, 30 min after the aurora breakup occurred on September 22, 2018. The footprints of the Arase satellite was located within the all-sky field of view at that time, and ~20 Hz intensity modulation was observed in the intensity of the lower band chorus waves. We present the possible correlations between the plasma waves and pulsating aurora in more detail, and examine the resonant energy quantitatively.