People rush to photograph the sun halo in Lao Cai

A halo occurs, signaling that it will rain less – Photo TL

Around 12 o’clock, many people in Lao Cai city and Sa Pa town actively hunt for the phenomenon of the sun being surrounded by a colorful halo.

The occurrence of the halo of the sun, leading some to speculate it is a supernatural phenomenon, heralds the impending spiritual event. Many people flocked to the street looking up at the sky to take pictures and share them on social media.

Mr. Luu Minh Hai, former director of the Lao Cai Provincial Hydro-meteorological station, who is considered an expert in the field of hydrometeorology in the Northwest, said, “The corona occurring in Lao Cai city is a complete phenomenon. completely normal”.

“In meteorology, there are 10 types of clouds, of which there are 4 types of low-level clouds, 3 types of middle-level clouds, and 3 types of high-level clouds. High-level clouds are composed of ice crystals. When this phenomenon occurs in the area, there are 10 types of clouds. Lao Cai has no low-level clouds, so when people observe, the sun at this time shines on the ice crystals, leading to the phenomenon of light refraction and reflection forming a circle around the sun and people call it. is the halo of the sun.

The halo of the sun is rainbow-colored with 7 colors but arranged in reverse. Rainbow has 7 colors red, green, blue, orange, melaleuca, purple from the inside out.

The sun halo also has 7 colors but vice versa. The fact that the halo occurs, it means that there is little rain,” explained Mr. Luu Minh Hai.

Previously, in Lao Cai and Sa Pa cities, there was scattered rain, heavy rain at night, light rain during the day and sometimes light sunshine.