The Bloop

The Bloop is the name given to a strange sound waves of low frequency detected by the National Oceanic and Atmospheric Administration (NOAA ) in 1997. These waves are still a mystery to science.During the Cold War , the Armed Forces of the United States placed numerous microphones anchored on the ocean floor in order to detect Soviet nuclear submarines. In 1997 , to check and fix these microphones, was detected in the South Pacific a very powerful sound that scientists christened bloop . The sound slowly descends in a range of almost sub- sonic frequency ( from 40 Hz down) for about 7 minutes and was amplitude (volume) enough to be detected by sensors in the three submarines 95W , 8S latitudes, and 8N , far apart over 5000 km This type of signal is not heard again sooner or later. It was determined that the sound source was located at 15:30 GMT on May 19, 1997 near the following coordinates: 50 ° S 100 ° W.

Although it was speculated enough that the source of the sound was an underwater animal, and whatever an unknown species of octopus or giant squid or a new kind of even bigger giant whale than the blue whale, the end seemed to be consistent with earthquakes generated by large icebergs when crack and fracture , although it could never be proven conclusively , meanwhile NOAA says that could be the Icequakes icebergs are cracking or fracture causing a sound similar to that of bloopThe origin of the bloop , is surprisingly close to the location of the fictional underwater city of R'lyeh , which is part of the mythology of H. P. Lovecraft, with works such as The Call of Cthulhu ( 1926). This has led many of his followers to establish relationships between this phenomenon and the entity called Cthulhu. In the ancient and enormous Lovecraftian Cthulhu mythology was locked in this mythical city .
What could be this mysterious sound?

They have raised a number of hypotheses about this sound, could be a whale five times bigger than the blue whale, because of their degree of propagation of sound, but the whales need to go out and breathe the surface, so this creature should have been spotted.
 
right now this is the sound the submarines heard, when they were miles away down in the deep blue ocean

the sound lasted at least 7 minutes, the comments of the crew were: "we don't know where this sound coem from, but what we think it is, is a enormous beast who lives in abbysal depths"