Giant monster in the deep sea?

In 1997, a sound, traced to somewhere around 50° S 100° W (South American southwest coast), was detected repeatedly by the Equatorial Pacific Ocean autonomous hydrophone array, which uses U.S. Navy equipment originally designed to detect Soviet submarines. According to the NOAA description, it "rises 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." Though it matches the audio profile of a living creature, there is no known animal that could have produced the sound. If it is an animal it would have to be huge — much larger than even a Blue Whale, according to scientists who have studied the phenomenon.

The Bloop:
Especially at 1:42.

Interestingly, the site of the Bloop is remarkably close to the site of the city of R'lyeh from H. P. Lovecraft's short story "The Call of Cthulhu", where an ancient undersea monster (Cthulhu) lies sleeping. Lovecraft said that R'lyeh is located at 47°9′S, 123°43′W in the southern Pacific Ocean, with the bloop also being targeted somewhere in that range.

Cthulhu, is that you? Nanu nanu?

Other articles on the bloop:
Wikipedia
CNN
The Age