Fig. 7
From: A new five-wavelength photometer operated in Tromsø (69.6°N, 19.2°E)
Comparisons of temporal variations of auroral emissions (20 Hz data) between 427.8 nm (black solid line) and 557.7 nm, 630 nm, 777.4 nm, and 844.6 nm from top to bottom are presented for 11 s between 20:16:48 UT and 20:16:59 UT on October 19, 2017. The emission intensity values of 557. 7 nm, 630 nm, 777.4 nm, and 844.6 nm are multiplied by 0.1, 5, 2, and 2, respectively, and denoted in red solid lines