Tracking the Region of High Correlation Between Pulsating Aurora and Chorus: Simultaneous Observations With Arase Satellite and Ground‐Based All‐Sky Imager in Russia

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  • S. Kawamura
    Graduate School of Communication Engineering and Informatics University of Electro‐Communications Chofu Japan
  • K. Hosokawa
    Graduate School of Communication Engineering and Informatics University of Electro‐Communications Chofu Japan
  • S. Kurita
    Institute for Space‐Earth Environmental Research Nagoya University Nagoya Japan
  • S. Oyama
    Institute for Space‐Earth Environmental Research Nagoya University Nagoya Japan
  • Y. Miyoshi
    Institute for Space‐Earth Environmental Research Nagoya University Nagoya Japan
  • Y. Kasahara
    Graduate School of Natural Science and Technology Kanazawa University Kanazawa Japan
  • M. Ozaki
    Graduate School of Natural Science and Technology Kanazawa University Kanazawa Japan
  • S. Matsuda
    Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Chofu Japan
  • A. Matsuoka
    Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Chofu Japan
  • B. Kozelov
    Polar Geophysical Institute Murmansk Russia
  • Y. Kawamura
    Graduate School of Communication Engineering and Informatics University of Electro‐Communications Chofu Japan
  • I. Shinohara
    Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Chofu Japan

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<jats:title>Abstract</jats:title><jats:p>The temporal modulations of magnetospheric chorus waves are one of the candidates for explaining quasiperiodic precipitation of energetic electrons causing pulsating aurora (PsA). To confirm fully the direct association between PsA and chorus, an extended interval of PsA (~1 hr) simultaneously observed by the Arase satellite and a ground‐based all‐sky imager in Apatity, Kola Peninsula, Russia was examined. In particular, a region of high correlation between PsA and chorus was continuously tracked within the field of view of the all‐sky imager. The result showed that the high‐correlation region and the modeled footprint of Arase moved in tandem. This strongly implies that the chorus and PsA electrons originated from the same local interaction region. In addition, the location of the high‐correlation region showed sudden jumps, which were probably associated with the motion of the satellite through discrete spatial structures of plasma in the region of wave‐particle interaction.</jats:p>

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