Great equinox aurora of 23 March 2023 caught early in the evening when there was a green arc to the south as the sky darkened that exhibited a dunes type of structure, with horizontal banding rather than vertical rays or curtains. Above is a purple arc that has some characteristics of a STEVE arc but is likely a standard vertical curtain. At right are Venus and the crescent Moon below, above the glow of twilight. Orion is left of centre, with Sirius embedded in the dunes arc. This is looking southwest to west. Photographed from southern Alberta, Canada.