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The sound appears to be seasonal, generally reaching peaks in spring and autumn, but it is unclear whether this is due to changes in the source or seasonal changes in the propagation environment. The source can be roughly located at 54°S 140°W / 54°S 140°W / -54; -140 , between New Zealand and South America
A spectrogram of Upsweep. Upsweep is a sound detected by the U.S. National Oceanic and Atmospheric Administration's (NOAA) equatorial autonomous hydrophone arrays. The sound was recorded in August, 1991, using the Pacific Marine Environmental Laboratory's underwater sound surveillance system, SOSUS, and is loud enough to be detected throughout the entire Pacific Ocean.
The bursts of sound resemble quacks, earning the recording the nickname “Bio-Duck.” Speculation about their source was varied. It could be an underwater submarine, or a fish .
The sound's source was roughly triangulated to , a remote point in the South Pacific Ocean west of the southern tip of South AmericaThe sound was detected by the Equatorial Pacific Ocean autonomous hydrophone array, [1] a system of hydrophones primarily used to monitor undersea seismicity, ice noise, and marine mammal population and migration.
New research from the University of California, San Diego could solve a mystery that scientists have puzzled over for several years.
Videos of eerie noises erupting from the skies have recently surfaced on YouTube, sending people into a panic around the world. The video above shows a particularly frightening episode of this ...
The Forest Grove Sound was an unexplained noise, described by The Oregonian as a "mechanical scream", heard in Forest Grove, Oregon in February 2016. External videos News report by KOIN 6
The mysterious sound began emanating from the Starliner about a week before the spacecraft is slated to undock from the space station without its crew and make its autonomous journey back to Earth.