Dartmoor Sundog

This lonely hawthorn tree surrounded by granite instantly evokes Dartmoor. On the second evening of my Dartmoor Tors and Hidden Valleys Photography Tour we were treated to a bright sundog which lasted over half an hour. This atmospheric phenomenon is caused by refraction of sunlight by ice crystals within high-altitude cirrus clouds, looking a little like a fragment of a rainbow but at 22 degrees to the position of the Sun in the sky.