Eerie 'Woman's Voice' Heard In Deep Ocean By NASA Still Unexplained 25 Years Later

A strange, loud sound echoing from the depths of the ocean has remained a mystery even decades after it was first picked up by scientists.

The haunting noise, which many say sounds like a woman’s voice, was recorded in the Pacific Ocean, and researchers have never been able to fully explain it.

This eerie sound was captured in 1999 by the National Oceanic and Atmospheric Administration, also known as NOAA, using their underwater listening equipment.

After doing extensive analysis to figure out the source of the noise, NOAA researchers managed to narrow it down to a large region in the Pacific Ocean. This area sits between two remote locations — Branfield Strait and Cape Adare.

The sound traveled more than 3,000 miles and reportedly lasted for about three full minutes. It was eventually nicknamed ‘Julia’, and many say it sounds like a woman softly humming, which adds to its mystery.

Now, even 25 years later, no one has been able to determine exactly what it was or where it truly came from.

The noise was heard deep in the Pacific Ocean Getty Stock Photo

To add to the mystery, the Branfield Strait and Cape Adare are actually pretty far apart —there’s a significant distance of hundreds of kilometers between them.

Since there weren’t any concrete explanations when it first came to light, people naturally started forming all kinds of eerie and imaginative theories about what could’ve caused the sound.

One of the wilder ideas? That it was some type of alien vessel cruising deep beneath the ocean surface.

In fact, a Reddit post added fuel to the speculation by claiming that around the same time the sound was picked up, “pictures from NASA's Apollo 33A5 shows a large shadow swaying through the southwest section of Cape Cadre at the same time as the recorded sound”.

If you’re curious and want to hear the sound for yourself, it’s still available to listen to online through various links and clips.

Not everyone is buying into the alien theories though. One skeptical user wrote: "Not really... if it's true, than this creature never bothered to attack us, or even cause trouble by travelling near one of our boats. Basically, nothing changes wether this is true or not. Sailing the ocean will be like it is right now."

And another chimed in with: "Actually there are several other cases of loud unidentified noises like this, and every single one has some lunatic conspiracy theory tied to it. It's the Internet, after all."

NOAA, on the other hand, has offered a more grounded theory. They believe the sound might have been created by an iceberg drifting through the waters.

The organization stated: "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."