Fig. 20From: A new five-wavelength photometer operated in Tromsø (69.6°N, 19.2°E)Scatter plots of auroral intensities (1 s 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 02:12:00 UT and 02:24:00 UT on January 23, 2018. Correlation coefficients (CC) are also shown at each panelBack to article page