The Bloop portrayed through a spectrogram.
Have you ever heard of “the Bloop”? It was an ultra-low frequency and extremely powerful underwater sound detected by the U.S. National Oceanic and Atmospheric Administration in a southern part of the Pacific Ocean in 1997.
The hydrophone array that picked up the sound was in a very remote part of the ocean. In the NOAA’s words, the Bloop "rose rapidly in frequency over about one minute and was of sufficient amplitude to be heard on multiple sensors, at a range of over 5,000 km."
The NOAA does not believe the sound came from a man-made object such as a submarine, bomb, or even something like an underwater volcano. Instead, the audio profile of the Bloop resembles that of other marine animals. If this were true, such a creature would be several times louder than the world’s loudest animal, the blue whale.
Is it possible that something larger than any whale is lurking in the depths of the ocean?
Original author unknown
Originally uploaded on October 24th, 2012