The Bloop

Thanks to my pal Mordicai and the glories of our parallel addiction to Wikipedia, I now have a new mystery to ponder: the Bloop. In 1997, the Equatorial Pacific Ocean Autonomous Hydrophone Array, which "uses U.S. Navy equipment originally designed to detect Soviet submarines", detected the repeated presence of an ultra-low-frequency sound matching the profile of a living creature, but indicating a creature that would have been much, much larger than a blue whale.

"To date there has been no explanation as to what produced the sound."

The Bloop, sped up 16x. (WAV file, 161kb)

Frankly, it's not really much to listen to. Not as good as the numbers stations, at least. Just one of those fascinating internet things I like to have pop up on my iPod shuffle now and then.

also:

Bloopwatch.com!