Rainbow Rings In Batam Sky, BMKG: Halo Phenomenon, Not A Sign Of Danger

A resident documented a halo phenomenon that adorned the sky over Batam City, Riau Islands, Monday (August 25, 2025). ANTARA/Special

BATAM - The Meteorology, Climatology, and Geophysics Agency (BMKG) Hang Nadim Class I Meteorological Station in Batam explained that the rainbow circle around the sun seen in the sky over Batam is a halo phenomenon.

"The halo phenomenon is the reflection of sunlight obscured by thin cirrus clouds," said Ramlan Djambak, Head of the BMKG Hang Nadim Station, when contacted by Antara in Batam on Monday, August 25.

This phenomenon was observed around 10:19 a.m. Western Indonesian Time (WIB), initially only a half circle, then becoming a full circle with a second, fainter row. According to Ramlan, thin, evenly distributed clouds make the halo clearly visible, while thick clouds would obscure the light reflection.

The halo phenomenon can last from 30 minutes to two hours and does not cause any impact.

"This is purely a celestial beauty; it does not affect sea levels or signal a disaster," he said.

This phenomenon was only seen in Batam and parts of Tanjungpinang or Bintan. Its presence has left residents wondering and capturing the rare sight.