Strange light in the sky of Da Lat

At noon yesterday, 13/5, in the sky of Da Lat city, there was a phenomenon of 'sun halo'.

This is a natural optical phenomenon but rarely seen, because the sun's light shines through the high-rise cloud, called Cirrostratus cirrus cloud, Cs symbol, is a thin, generally uniform, cloudy type of cloud from ice crystals, capable of creating halo.

Images recorded at 10:30 in Dalat. (Photo: Thuy Trang / employee)

When it is thick enough to be visible, it is white, often without distinguishing features. When covering the whole sky and sometimes too thin to be recognizable, it can indicate the presence of large amounts of moisture in the upper layer of the atmosphere.

The cascading clouds are sometimes a sign of hot start and therefore may be a sign that precipitation may occur within the next 12-24 hours or in the future where the weather may be good. up, not rain in the coming days. Cloudy clouds are located at a height of over 6,000m. The time of the sun halo can last more than an hour.

When the sun halo appears, the current weather expression in the locality is good, not rain, dry, sunny weather. The halo appears only during the day (with the sun), or at night (with the moon).

The sun or moon halo is an optical phenomenon, because the sun's or moon's light shines through a high-rise cloud of about 600-8,000 meters. Because clouds are structured as ice crystals, then sunlight and the moon are refracted, producing circles.

Sun halo or moon halo has 7 colors like the color of the rainbow. However, the color arrangement of the halo is opposite to the rainbow. The bottom is red, followed by orange, yellow, green, blue, indigo, purple.