Thursday, September 15, 2011
Huatulco Solar Halo
This is what our noontime sky looked like today. What a phenomena! And of all days, El Grito, Mexico's Independence Day. More about El Grito after tonight's festivities when the sky will light up again, but with unnatural phenomenom, Fireworks!
This is what wikipedia.com has to say about sun or solar halos:
A halo from Greek ἅλως; also known as a nimbus, icebow or gloriole) is an optical phenomenon produced by ice crystals creating colored or white arcs and spots in the sky. Many are near the sun or moon but others are elsewhere and even in the opposite part of the sky. They can also form around artificial lights in very cold weather when ice crystals called diamond dust are floating in the nearby air.
There are many types of ice halos. They are produced by the ice crystals in cirrus clouds high (5–10 km, or 3–6 miles) in the upper troposphere. The particular shape and orientation of the crystals is responsible for the type of halo observed. Light 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 sunlight between their faces, sending shafts of light in particular directions