Something in the deep made a sound that echoed through the Pacific. It took 8 years to find the source.

In 1997, NOAA researchers recorded a mysterious ultra-low-frequency noise so powerful it registered on sensors thousands of ...
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What the Mysterious Bloop Taught Us About Antarctica

Is it a fish? Is it a sea monster? Is it Cthulhu? In 1997, while using underwater microphones to monitor volcanic activity in the depths of the southern Pacific Ocean, researchers with NOAA's Pacific ...
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Listen to 'the bloop,' a strange noise recorded in the southern Pacific Ocean that stumped scientists for years

Add Yahoo as a preferred source to see more of our stories on Google. In 1997, NOAA scientists recorded a haunting, strange sound in the southern Pacific Ocean's depths. Theories about the sound's ...