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Halo effect hits Hong Kong, dazzling public with natural sun phenomenon

  • Observatory says halos are created when sunlight hits ice crystals suspended high in the atmosphere
  • Scientific officer at meteorological service says high clouds are required, where ice crystals form and create favourable conditions for halo formation

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A halo formed by sunlight hitting ice crystals is seen over Hong Kong at Tsim Sha Tsui. Photo: Jelly Tse
Hong Kong was on Tuesday dazzled by a halo around the sun, a natural phenomenon that can only be seen when meteorological conditions are right.

The Observatory posted pictures on its social media accounts at noon that showed a halo above its headquarters and asked the public to share images of the circular light as seen in their areas.

Dozens of people took to social media to share their view of the halo and discuss the meteorological marvel, which has been visible several times this month.

Jennifer Yip Ling, a scientific officer at the Observatory, explained that halos could be formed all year round and had been spotted in the last few years.

The white circular or curved ray of light can be seen to encircle the sun and create a halo effect when weather conditions are right.
A halo around the sun, as seen from Tsim Sha Tsui. Photo: Jelly Tse
A halo around the sun, as seen from Tsim Sha Tsui. Photo: Jelly Tse

It is produced when sunlight is reflected or refracted by ice crystals suspended in the atmosphere.

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