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Another Escazu resident, Jessie Montealegre, said she was also was amazed by the sky phenomenon.

\"It was breathtaking,\" she said. \"It’s like a sign of God.\"

Though users on social media have various theories on what caused the light formation, including aliens or UFOs, experts said the stunning view was caused by a rare weather phenomenon called \"cloud iridescence.\"

IlluOminous perturbations. #escazu #sanjose #costarica

The colorful luminescence is caused by the sun's light being refracted by water droplets and ice crystals in the cloud, said, Eladio Solano, a meteorologist with Costa Rica's National Meteorological Institute, according to Costa Rica media outlet Teletica News.

\"PHOTO:
Carole Rich Williams
PHOTO: A rare fire rainbow appeared above an island in South Carolina.
>

The phenomenon produced a similar sky spectacle in South Carolina last month that was dubbed a \"fire rainbow.\"

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