Supplementary Material

Movie S1: Panchromatic all-sky images of Event #1 on July 24–25, 2018, were obtained from the Electron-Multiplying Charge Coupled Device (EMCCD) camera at Syowa Station. Magnetic south is at the top, and magnetic east is to the right. The original sampling rate was 100 frames per second, and all the images were averaged every 1 s to reduce the effective time resolution and random noise. The movie plays at 60 averaged images per second. The PANSY radar’s beam positions of local zenith, geographic north, east, south, and west are shown by crosses.

Download Video: Formats: mp4 (2.6 MB) | webm (3.1 MB) | ogg (13.5 MB) | Original mp4 (2.6 MB)

Movie S2: Panchromatic all-sky images of Event #2 on May 25–26, 2017. Formats are the same as Movie S1.

Download Video: Formats: mp4 (2.8 MB) | webm (3.7 MB) | ogg (11.7 MB) | Original mp4 (2.8 MB)

© K. Murase et al., Published by EDP Sciences 2022