Mysterious Ocean Sound Still Baffles Scientists 25 Years Later

In March 1999, researchers from the National Oceanic and Atmospheric Administration (NOAA) recorded a bizarre acoustic signal in the eastern equatorial Pacific Ocean. The sound, dubbed “Julia”, lasted for nearly three minutes and stunned scientists due to its uncanny resemblance to a female human voice. How and Where It Was Heard What made the phenomenon even more astonishing was the sheer reach of the signal. The “Julia” sound was picked up by underwater microphones over 4,800 kilometers away from its estimated point of origin — a testament to the sound’s remarkable strength. According to NOAA data, the signal originated from a region located between Bransfield Strait and Cape Adare, near the Antarctic coastline. This remote zone is notorious for its harsh climate, making direct investigations difficult and complicating the search for any definitive source.