This is exactly what occurred when a peculiar "bloop" sound was detected in the Pacific Ocean in 1997. After years of speculation and debate, scientists eventually unraveled the mystery behind it.

In 1997, the Bloop was heard on hydrophones across the Pacific. It was a loud, ultra-low frequency sound that was heard at listening stations underwater over 5,000km apart, and one of many ...

In 1997, Bloop was detected by U.S. Navy "spy" sensors 3,000 miles apart that had been put there to detect the movement of Soviet submarines, the magazine reports. RESOURCES • ...

Key Facts: In 1997, the Bloop was picked up by sensors about 2,414 km (1,500 mi) west of the southern Chilean coast. If organic in nature, the Bloop […] Skip to content. All Sections.

In 1997, Bloop was detected by U.S. Navy "spy" sensors 3,000 miles apart that had been put there to detect the movement of Soviet submarines, the magazine reports. The frequency of the sound meant ...