Underglow more commonly is known from the social-vanity phenomenon of strapping L.E.D. strands on the underbellies of cars to make the street light up. However, the atmosphere can do it to, in a bass-ackwards way. It helps hugely to have a large water body beneath! Here, following a gorgeous sunrise, the show wasn’t done. After the sun has disappeared behind the cloud edge from our viewing angle, the cloud base glowed with a bronze tint, reddened by both dimness and passage of light across a long atmospheric trajectory from sun, to reflective ocean, to cloud, to eyeball. To some extent, this phenomenon appears above brightly colored land areas too, such as over the extensive reddish surface of the Painted Desert in Arizona.
5 NW Bar Harbor ME (4 Oct 22) Looking E
44.432, -68.2613