Julia is the name given to the unknown source of a March 1, 1999 sound recording. It was captured utilizing an automated hydrophone array in the eastern equatorial Pacific.
The source of the sound, heard for thousands of kilometers, has been widely disregarded as an iceberg aground somewhere off the coast of Antarctica. Its origin is somewhere between the Bransfield Straits and Cape Adare.
However, a classified photograph that later appeared, a classified image later censored, acquired by a NASA satellite, shows something with an enormous shadow, within the waters of Cape Adare at the time, which if confirmed as a living species, would be categorized as a sea monster of massive dimensions.
Over the last few years, the National Oceanic and Atmospheric Administrations, or NOAA for short, have captured and broadcast various intriguing sounds of probable underwater monsters.
The Upsweep is a sound that has yet to be recognized and was heard by the American NOAA’s equatorial autonomous hydrophone arrays. When the Pacific Marine Environmental Laboratory began recording its sound surveillance system, SOSUS, in August 1991, this sound was present. It consists of a long train of narrow-band upsweeping sounds, each lasting several seconds. The source level was high enough to be heard all the way across the Pacific.
The sound appears to be seasonal, with peaks in spring and autumn, but it is unknown why. The source is generally placed around 54°S 140°W, near the site of volcanic activity, but the sound’s origin is unknown.
The Whistle was recorded in the Pacific Ocean’s Mariana volcanic arc, but because it was only captured on one hydrophone rather than the three required to establish a location, it is classified as “unidentified.”
Bloop is the term given to an ultra-low-frequency and powerful underwater sound discovered in 1997 by the United States National Oceanic and Atmospheric Administration. The source of the sound was roughly triangulated to a remote area in the south Pacific Ocean west of South America’s southern tip, and it was heard numerous times.
According to the NOAA report, it climbed in frequency rapidly over one minute and had enough amplitude to be heard on several sensors at a range of more than 5,000 kilometers.
Dr. Christopher Fox believes it is not the result of an artificial event, such as a submarine or bomb, nor is it related to geological phenomena, such as volcanoes or earthquakes.
Bloop’s auditory profile does, in fact, approximate that of a living organism. However, the source is unknown, both because it is unlike any other known sound and because it is several times louder than the loudest animal ever recorded, the blue whale.
Another strange deep-sea sound, Slow Down, was recorded on May 19, 1997, in the Equatorial Pacific Ocean. The term was picked because the frequency of the sound gradually falls over the course of 7 minutes. It was captured with the use of an automated hydrophone array. Since 1997, the sound has been recorded multiple times every year.
Finally, the Train is the name given to a sound recorded on the Equatorial Pacific Ocean autonomous hydrophone array on March 5, 1997. The frequency of the sound climbs to a near-steady level. What’s particularly intriguing about this sound is its roots, which are also within Cape Adare, Julia’s exact geographical region.
Could some of these noises be mating calls from unknown sea monsters? Perhaps one day. We’ll discover out…
