Bloop is the name given to a powerful ultra-low frequency detected by the National Oceanic and Atmospheric Administration (NOAA) U.S. several times during the summer of 1997. To this day, the origin of this sound is still unexplained.
The sound was located around 50° S 100° W/-50, -100 (south-west coast of South America). It was detected by the Equatorial Pacific Ocean autonomous hydrophone array. This array uses equipment from the Sound Surveillance System of the United States Navy. Its original purpose was tracking Soviet submarines.
From the description of NOAA, the sound “rises rapidly in frequency for about one minute at an amplitude sufficient to be detected by several sensors on a range of over 5000km. Although it matches the audio profile of a living creature, there is no known animal that could have produced that sound. If it was an animal, it would be extremely big, bigger than the blue whale, according to scientists who have studied the phenomenon.
There is currently no official explanation about the origin of this sound and it has not been heard since 1997.
There are however so hypothesis:
– It is possible to identify animals by the sound they emit. The bloop, although it resembles the sound emitted by a blue whale, originated from a distance of 4800 km. Some think that this sound could have been emitted by a whale (of extreme proportions) and carried over a distance by the warm ocean currents.
– Some scientists speculate that this sound could be emitted by a huge and still undiscovered giant squid or octopus, or a new species of whale or fish even larger than the blue whale. However, these assumptions are challenged by the fact that cephalopods are not known to possess the gas membrane needed to produce this kind of sound, and that a whale must surface to breathe and would have therefor been observed long ago. Only the assumption of the giant fish remains valid.
– Theoretically, the Bloop could be produced by a machine. The frequency is possible, but the volume would be more difficult to produce. A nuclear submarine is a conceivable hypothesis: when the submarine dives or resurface it fills or purges its ballast. The filling or purging of these ballasts can last between 30 seconds and one minute.
– It is also possible that this sound is produced by a large number of creatures emitting a vibration in a synchronized manner.
– A seismic hypothesis seems unlikely given the nature of the sound and the fact that it was repeated several times. Furthermore there is no underwater seismic activity in this region.
– In 2005, the scientific journal Science described a complex phenomena created by icebergs that produces sounds at very low frequencies.
There are also two interesting coincidences. The origin of the Bloop is relatively close to the fictional city of R’lyeh devised by H. P. Lovecraft in The new Call of Cthulhu. R’lyeh would be located at 47 ° 9’S 126 ° 43’W / -47.15, 126 717 in the South Pacific Ocean. In Lovecraftian mythology, Cthulhu was locked in this mythical city.
The origin of sound is also close to point Nemo (48 ° 50’S 123 ° 20’W / 48 833, 123 333 (Point Nemo)), that is to say, the point farthest in the ocean from any land mass and is therefor rarely frequented by humans.
Whatever the cause was, many people see this as a proof that there is still many things unknown in this world.
Conspiracy enthusiasts might appreciate the fact that the Bloop was a sound lasting about a minute, yet every online source displays a audio version lasting only 1 second. Attempts to “slow down” the tape only results in poor quality.