Visibility III / V
In the evening I left GoPro to shoot in the hope of northern lights / fireballs. As for the northern lights, the outlook was quite modest and only one of the fireballs seems to remain in the pictures. But the fog arches appeared on many occasions. The main cause of the arcs is the bright floodlights about half a mile away (whose orientation is a bit wrong). The second arc was also dimmer in the pictures, it is probably caused by the moon. That arc appears slightly lower than the brighter arc caused by artificial lights. I compiled the images into a gif animation where that phenomenon is shown a little more clearly.