In 1997, the U.S. National Oceanic and Atmospheric Administration (NOAA) detected a strange noise in a remote part of the Pacific Ocean. After several repeated incidents, the sound vanished, never to be heard again. What did the bloop sound like? And what was behind the strange noise?

What was the Bloop?

The Bloop was a powerful, ultra-low frequency underwater sound. During the summer of 1997, it was detected several times by a hydrophone array in the Pacific Ocean, southwest of South America. After that summer, the sound never returned.

“[The Bloop] 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.” ~ NOAA

Speculation about the Bloop’s origin continues to this day. Dr. Christopher Fox, who named the Bloop, doesn’t believe that it originated from humans or a geological event. In fact, he thinks it came from an animal due to the fact that “its signature is a rapid variation on frequency similar to that of sounds known to be made by marine beasts.” There’s just one problem with his theory. The Bloop was far louder than noises caused by any other ocean-based creature, including whales. So, whatever caused the Bloop is either bigger than a whale or far more efficient at generating sound.

Guerrilla Explorer’s Analysis

Is it possible that the Bloop was some sort of sea serpent, similar to the one reported by the 1840 voyage of the HMS Daedalus? It seems possible but until the Bloop decides to resurface again, the best we can do is speculate.