Julia (unidentified sound)

"Julia" is a sound recorded on March 1, 1999 by the U.S. National Oceanic and Atmospheric Administration (NOAA). NOAA said the source of the sound was unknown, but sufficiently loud to be heard over the entire Equatorial Pacific Ocean autonomous hydrophone array. It lasted for about 15 seconds, and its origin was in the equatorial Pacific Ocean at approximately 15° S 98° W.[1]

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