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Solar halo seen in northern Vietnam sky

Solar halo seen in northern Vietnam sky

Wednesday, May 22, 2024, 12:26 GMT+7
Solar halo seen in northern Vietnam sky
The solar halo in the sky over Hai Phong City, northern Vietnam, May 21, 2024. Photo: Tien Thang / Tuoi Tre

A halo around the sun appeared in the sky of many localities in northern Vietnam, such as Hai Phong City and Quang Ninh and Thai Binh Provinces, on Tuesday.

The sun was surrounded by a circular rainbow between about 11:00 am and 11:30 am.

Many people have shared images of the phenomenon on social media, believing this was a good omen.

The phenomenon can be sighted in the sky over many northern Vietnamese localities on May 21, 2024. Photo: Tien Thang / Tuoi Tre

The phenomenon could be sighted in the sky over many northern Vietnamese localities on May 21, 2024. Photo: Tien Thang / Tuoi Tre

According to scientists, this is a normal natural phenomenon, called a 22° halo.

This is an atmospheric optical phenomenon that consists of a halo with an apparent radius of approximately 22° around the sun or moon. It forms as sunlight or moonlight is refracted by millions of hexagonal ice crystals suspended in the atmosphere.

The phenomenon is more commonly seen around the moon and is rarer surrounding the sun.

It looks like a rainbow ring surrounding the sun. Photo: Tien Thang / Tuoi Tre

It looks like a rainbow ring surrounding the sun. Photo: Tien Thang / Tuoi Tre

Scientists say it is a normal natural phenomenon. Photo: Tien Thang / Tuoi Tre

Scientists say it is a normal natural phenomenon. Photo: Tien Thang / Tuoi Tre

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Thanh Ha - Tien Thang / Tuoi Tre News

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