Fig. 8From: A new five-wavelength photometer operated in Tromsø (69.6°N, 19.2°E)Scatter plots of auroral intensities (20 Hz data) between 427.8 nm and 557.7 nm (top-left), 630 nm (top-right), 777.4 nm (bottom-left), and 844.6 nm (bottom-right) between 20:16:48 UT and 20:16:59 UT on October 19, 2017. Red solid lines are fitted lines determined with the least square fitBack to article page