The mysteries of the world’s oceans are as vast as the seas themselves, spreading across more than 70% of the earth’s surface, and still to this day, remaining largely unexplored.
And one unknown occurrence has remained unanswered for 25 years.
Back in 1991, the National Oceanic and Atmospheric Administration captured an underwater sound off the Pacific Ocean, near the equator, eerily resembling that of a woman. As such, they named the phenomenon “Julia.” And still, they’ve been scratching their heads as to what may have caused the anomalous noise. Hear it below.
Of course, online, conspiracy theorists have their ideas about what the sound may be. Like on Reddit, where some users commented and cautioned:
“So T-Rex didn't go extinct. He moved into the ocean to escape the heat from the apocalypse and is now a fish. Got it.”
“This is terrifying.... It's why you'll never find my ass out on a cruise ship. No thank you.”
“What could be causing that? Could it be something similar to the big blip, or like an under water eruption?”
“RELEASE THE KRAKEN!”
Related: Surfing Biggest Mysteries: From Greg Noll at Makaha to the Magic of Kelly Slater
In reality, the experts at NOAA do have a pretty distinct idea of what the mysterious sound may be. They believe it was the sound of an iceberg grounding on the seafloor. NOAA continued:
“This sound was recorded on March 1, 1999 on the eastern equatorial Pacific autonomous hydrophone array. The most likely source of the sound formerly known as “Julia” is a large iceberg that has run aground off Antarctica. Due to the uncertainty of the arrival azimuth, the point of origin could be between Bransfield Straits and Cape Adare with an origin time of 1999 JD60 21:05GMT.”
Or, just maybe, there’s more secrets in the ocean’s depths that we’ve yet to discover.
Related: 1,000,000,000,000 Ton Iceberg Breaks Loose in Antarctica
Haunting Underwater Voice Remains Mystery 25 Years Later (Listen) first appeared on Surfer on Aug 4, 2025
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