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Ammon News - A creepy green flash illuminated the sky as the sun set over the ocean in Oregon.

The bizarre moment was captured by Craig Hayslip, a faculty research assistant at Oregon State University.

Hayslip posted a picture of the sunset and the snap of the green light, which some have branded 'paranormal,' to his Instagram last week. The photo left people stunned at the sight and offering explanations for what they were seeing.

The 'elusive' green flash occurs when the sun is almost entirely below the horizon, while its upper edge remains visible.

In that moment, the upper rim of the sun can turn a vibrant shade of green or even electric blue.

Oregon Live reported that staff at the Marine Mammal Institute said they have witnessed the flash 'quite frequently' while at sea.

According to Earth Sky, the best time to see the phenomenon is during a clear, non-hazy day with no clouds on the horizon.

Besides being visible from the ocean or beach, the green flash can also be seen from the top of tall buildings or mountains, the outlet said. It is recommended that those who witness the spectacle should not look directly at the sun as it could cause eye damage.

Daily Mail