I love this picture ... not because of the colors, because of the halo effect! No, it is not natural ... The sky was colorful but the pictures weren't coming great because sun was too bright! I used a stack of ND filters to reduce the brightness. The filter reflected light on the lens and the result is optics generated HALO! You see, below the sun is ocean of clouds reflecting the red light!
Location is summit of Fremont Peak near San Juan Bautista which is part of Gabilan range parallel to the central California coast. One weekend I camped here with a group. And happened to see Planet Saturn with the help of a telescope set up by a co-camper. It was really a thrilling experience.---