The Bloop: Unraveling the Mystery of the World’s Most Powerful Underwater Sound

In 1997, the National Oceanic and Atmospheric Administration (NOAA) detected an ultra-low frequency, high-amplitude underwater sound, dubbed “The Bloop.” The sound was picked up by the Equatorial Pacific Ocean autonomous hydrophone array, a system designed to monitor undersea seismicity, ice noise, and marine mammal population and migration. The Bloop’s origin remained a mystery for years, sparking speculation about its source.