January 13, 2014 Lunar Halo Philippines
I can’t help not to feature some photos taken by Filipinos who looked up and took time to image the beautiful 22 degree lunar halo on monday night. I wish I was in Manila to witness the event!
For those who are asking what causes the atmospheric phenomenon, here’s a good explanation by Gary Andreassen, a member of Astronomical League of the Philippines:
A moon halo is produced by the ice cystals in cirrostratus clouds (5–10 km high) in the upper troposphere. The light of the moon is reflected and refracted by the ice crystals and may split up into colors because of dispersion. The crystals behave like prisms and mirrors refracting and reflecting moonlight sending shafts of light in particular directions.
A moon halo often means that rain is going to fall within the next 24 hours as the cirrostratus clouds that cause them can signify an approaching frontal system. Moon halos are actually quite common in the Philippines this time of year.
Below are images taken by Filipinos who witnessed the event: