Auroral rays during the great equinox display of northern lights on 23 March 2023. The rays have a strong vertical structure from precipitating electrons but were pulsing off and on rather than rippling. The predominant colour is green and there is a lot of red and magenta mixed in. The rays are converging upward to the magnetic zenith. This is looking northwest. Cassiopeia is at centre. The Pleiades are at left. Photographed from southern Alberta, Canada.