Fig. 17From: A new five-wavelength photometer operated in Tromsø (69.6°N, 19.2°E)Comparisons of temporal variations of auroral emissions (20 Hz data used) between 427.8 nm (black) and 557.7 nm, 630 nm, 777.4 nm, 844.6 nm from top to bottom are presented for 1 min between 22:33:00 UT and 22:34:00 UT on January 22, 2018. The emission intensities of 557. 7 nm, 630 nm, 777.4 nm, and 844.6 nm are multiplied by 0.1, 2, 2, and 2, respectively, and denoted in red solid linesBack to article page