Explains the phenomenon of brilliant halos appearing around the Sun in many places in the North

On the afternoon of May 21, images appeared on social networks of a halo phenomenon in the sky. According to the recorded images, the sun is surrounded by a colorful halo, creating an extremely beautiful and magical scene.

This phenomenon is most clearly seen in the city. Hai Phong and Hai Duong province... Immediately after being shared on social networks, the above aura attracted thousands of likes and comments. Some people even believe that this is a harbinger of natural disasters.

According to records, the halo phenomenon appeared most clearly from 10:30 a.m. to 11 a.m., noon on May 21. In particular, the halo surrounding the Sun creates an extremely eye-catching scene in the sky.

The appearance of the solar halo quickly became a "fever" on social networks. Many people took advantage of taking photos, recording videos and sharing these unique moments.

One day earlier, people living in the Dong Nai area also encountered a bright halo in the sky similar to people in the North. The areas where this phenomenon is most clearly seen are in districts such as Tan Phu, Dinh Quan, Xuan Loc...

Photos with unique poses and halos have been widely spread on social networking platforms. Some netizens even humorously posted pictures with content like "suddenly enlightened" and "arrogant descending to the mortal world" to make this phenomenon more interesting.

Not stopping there, netizens also collage and edit halo images with other humorous ideas such as halo images of money, halos of beer - an interesting cooling drink in the summer. hot summer.

Solar halos occur when sunlight interacts with ice crystals suspended in the atmosphere, forming a white or colorful halo of red, orange, yellow, green, blue, indigo, and violet. This is a normal optical phenomenon in the sky.

According to scientists, solar halos often appear at noon on sunny days. Although not a rare phenomenon, its occurrence does not follow certain rules and is not related to natural disasters.

The halo surrounding the Sun is rings of light surrounding the Sun, often appearing when there is a thin layer of clouds in the sky. The combination of Chemistry, Physics and Geometry is the main cause of creating the Sun's halo. This phenomenon can also happen with the Moon.

According to the Vietnam Association of Astronomy and Cosmology, the halo is also called the 22-degree halo. This optical phenomenon occurs in the Earth's atmosphere in the vicinity of the bright disk of the Sun or Moon when the weather is very dry, with little water vapor, and in the upper layers of the atmosphere there is only a low density of ice particles (water). stone).

Light from the Sun or Moon (lit by the Sun) when entering the atmosphere through these hexagonal crystals is refracted, causing a phenomenon similar to when passing through a diverging lens, creating forming a white light ring with a radius of about 22 degrees (44 degrees diameter width) around the light disk. This phenomenon is commonly observed on the Moon and less commonly on the Sun.

Because it occurs at a time when the air has little water vapor and it is difficult to rain, the ancient Vietnamese had the saying "The moon is haloed in drought, the moon is haloed in rain" - the halo in this sentence refers to the 22 degree halo of the Moon. As for the Sun, although it appears less often, it is not too rare. People who like nature photography often have interesting photos when this phenomenon occurs around the bright disk of the Sun.

This phenomenon can appear in many different colors, depending on many factors such as time, amount of water in the air, dirt... so in each place, people can see auras with many different colors. different colors.

Aura is a relatively common phenomenon, but it is not always easy to observe. To be able to see the aura clearly, favorable weather conditions and a suitable observing location are required.

Learning more from scientific documents shows that the solar halo phenomenon, also known as halo, occurs when sunlight is blocked by Cirrostratus (Cs) clouds. This type of cloud usually exists at altitudes above 6000 m and is made of thin ice crystals, creating a faint phenomenon that covers the blue sky when sunlight penetrates. Halos can appear in many forms, from white or colorful circles to arcs and points of light in the sky.

On the afternoon of May 12, colorful rainbow-shaped clouds appeared in the sky west of Ho Chi Minh City. It is known that that beautiful cloud remained for an hour and gradually disappeared as the sun gradually set.

Also according to meteorological experts, the recent cloud phenomenon is called iridescent clouds, which is classified as a halo in meteorology. These rainbow-shaped clouds will appear when there is diffraction, causing cloud particles or small, individually structured ice crystals to scatter light. Larger ice crystals, even though they cannot form iridescent colors, can still cause a halo that we can see.

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