On August 25, Singaporeans were treated to a rare and breathtaking natural phenomenon: a sun halo. Around noon, a radiant ring of light appeared around the sun, sparking excitement among residents across the island. Many took to social media to share photos and videos of the spectacle, quickly turning it into one of the day’s most talked-about events.
The sight, though short-lived, brought joy to both young and old. Messages urging others to head outdoors to witness the halo began circulating online, with TikTok users posting clips and reminding viewers to put on sunglasses before looking skyward.
What is a Sun Halo?
A sun halo occurs when sunlight interacts with ice crystals suspended in the atmosphere at very high altitudes. Unlike clouds made up of water droplets, these crystals refract and reflect sunlight in a unique way, creating a luminous circle around the sun.
According to meteorological experts, the halo forms when light enters one side of a hexagonal ice crystal and exits through another, bending the rays at an angle of about 22 degrees. This explains why halos appear as a perfect ring encircling the sun.
Although it is safe to look at the halo itself, the National Environment Agency (NEA) has consistently warned against looking directly at the sun without protective eyewear, as doing so can cause permanent eye damage.
Personal Encounters with the Halo
For many Singaporeans, August 25 marked their first time experiencing this natural wonder.
Ms Natalie Neo, 34, a finance professional working from home along Farrer Road, noticed the halo around 12:30pm. Describing her reaction, she said:
“I felt blessed that I was able to see something like that. It was my first time seeing a sun halo, and it made the day feel special.”
Meanwhile, communications professional Mr Ow Yong Weng Leong spotted the halo around 1pm in town. For him, the experience was deeply personal.
“Today is granny’s lunar birthday. When I saw the halo, I felt like she was smiling down on us from heaven,” he shared, reflecting on how the moment connected him to his late grandmother.
Expert Insights on the Phenomenon
Professor Matthias Roth, a geography expert from the National University of Singapore, explained that the bending of light through ice crystals is what creates the phenomenon.
“As light enters one face of the ice crystals and exits through another, it is bent by about 22 degrees, which accounts for the radius of the halo,” he said in an earlier interview.
While halos can appear in different parts of the world, they are relatively uncommon in Singapore. The NEA has noted that the country’s sky is often obscured by low- to mid-level clouds, which block the high-altitude ice crystals necessary for halo formation.
How Often Do Sun Halos Occur in Singapore?
The August 25 halo was not the first sighting in recent years. Earlier this year, on March 15, another halo was observed and widely documented. Still, the phenomenon remains rare enough to spark widespread excitement whenever it occurs.
Meteorologists emphasize that predicting the exact time and place of a halo is nearly impossible. It depends on the specific presence and arrangement of ice crystals in the upper atmosphere, conditions that cannot be forecasted with precision.
Social Media Buzz and Public Fascination
As soon as the halo appeared, it became a trending topic across social platforms. Photos flooded Facebook, TikTok, and Instagram, with many Singaporeans urging their friends not to miss the moment.
One TikTok user encouraged viewers: “Don’t miss it, guys. Go out and watch it with sunglasses.”
The widespread sharing highlights how natural events like this continue to unite Singaporeans in shared wonder and curiosity, even in a busy urban environment.
Conclusion: A Moment of Shared Wonder
The sun halo of August 25 reminded Singaporeans of the beauty and unpredictability of nature. While brief, the phenomenon left a lasting impression on those who witnessed it and provided a welcome pause in the daily grind.
Though rare, halos serve as a reminder that awe-inspiring sights can appear even in the middle of an ordinary day. As Singapore continues to record such events, residents remain hopeful that they will have more chances to look up and marvel at the sky.
