Fan-Shaped Aurora (VIDEO)

Research Organization of Information and Systems

Caption

The time-lapse photography of the microfilm data of all-sky photographs taken at Memambetsu Magnetic Observatory on February 11, 1958. After digitization of the microfilms, we manually centered, scaled, and rotated the images without altering the contrast or brightness. The final data were saved in an all-sky format, where zenith is the center, geographic north is to the top, and the 90° from the zenith is at the edge of the square.

Credit

Japan Meteorological Agency

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