This may be one of those situations where my love of a good story gets me in trouble with the more hard-minded scientific types among you, so please understand first that this is all intended in fun. Nonetheless, there are some intriguing facts here.

During the summer of 1997, the U.S. National Oceanic and Atmospheric Administration (NOAA) repeatedly detected an extremely powerful underwater sound on an array of Cold War era hydrophones originally installed to listen for soviet submarines. “While it bears the varying frequency hallmark of marine animals, it is far more powerful than the calls made by any creature known on Earth.” Phil Lobel, a marine biologist at Boston University, purportedly “agrees that the sound is most likely to be biological in origin,” although his opinion appears to be in the minority. (Both quotes from this article at The approximate origin of the sound has been identified as 50 S x 100 W, which is almost exactly the same latitude as Lovecraft’s fictitious sunken city of R’lyeh, at 48 S x 123 W, although it is 1000 miles distant in terms of longitude. [Thanks, Maredith!]

You can listen to a sped-up version of “The Bloop” on the NOAA website here.

Sean Michael Ragan

Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I am a long-time contributor to MAKE magazine and My work has also appeared in ReadyMade, c’t – Magazin für Computertechnik, and The Wall Street Journal.

  • daqq

    Sounds like Cthulhu has gas…

  • Anonymous

    It bodes ill to mock the squamous flatulence of the ancient one.

  • ehrichweiss


  • Anonymous

    FOOLS. You have damned us all.

  • Dave

    Interesting that that location (50S, 100W) lies to the east of the Menard Fracture Zone.


    • Bill

      >…which is almost exactly the same latitude…

      Um, just FYI, the distance between 50 S x 100 W and 48 S x 123 W is about a THOUSAND MILES. Then again, Cthulhu knows no bounds of time and space.