Janis Satrovskis took the picture on Aug. 11th from Burtnieki, Valmiera, Latvia. “The green airglow provided a beautiful backdrop for the meteor shower,” says Satrovskis.
Airglow is aurora-like phenomenon caused by chemical reactions in the upper atmosphere. Human eyes seldom notice the faint glow, but It can be photographed on almost any clear dark night, anywhere in the world. The source of the green light is oxygen atoms some 90 km to 100 km above Earth’s surface where gravity waves impress the verdant glow with a dramatic rippling structure.