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See media help. Upsweep is an unidentified sound detected on the American NOAA's equatorial autonomous hydrophone arrays. This sound was present when the Pacific Marine Environmental Laboratory began recording its sound surveillance system, SOSUS, in August 1991. It consists of a long train of narrow-band upsweeping sounds of several seconds in ...
Pages in category "Unidentified sounds". The following 10 pages are in this category, out of 10 total. This list may not reflect recent changes. List of unexplained sounds.
Bloop was an ultra-low-frequency, high amplitude underwater sound detected by the U.S. National Oceanic and Atmospheric Administration (NOAA) in 1997. [1] By 2012, earlier speculation that the sound originated from a marine animal [2] was replaced by NOAA's description of the sound as being consistent with noises generated via non-tectonic ...
The sound was detected at 2am local time by a Canadian P-3 aircraft. It first came every 30 minutes and was heard again four hours later, the internal government memo obtained by CNN states.
Bio-duck is a sound recorded in the Southern Ocean, specifically in Antarctic Waters and the West Coast of Australia. [ 1][ 2] It was first reported in 1960 by submarine personnel, who gave the sound its name, associating it with that of a duck. [ 3] Once dubbed as the “largest still unresolved mysteries of the Southern Ocean”, [ 4] the ...
Unidentified sounds (10 P) U. Unidentified flying objects (4 C, 8 P) W. Anomalous weather (19 P) Pages in category "Unexplained phenomena"
List of reported UFO sightings. Most commonly reported shapes in UFO sightings gathered by the National UFO Reporting Center Online Database (NUFORC) [1] This is a list of notable reported sightings of unidentified flying objects (UFOs) and related claims of close encounters or abductions. UFOs are generally considered to include any perceived ...
Forest Grove Sound. The Forest Grove Sound was an unexplained noise, described by The Oregonian as a "mechanical scream", heard in Forest Grove, Oregon in February 2016. In February 2016, a high-pitched noise was heard intermittently at night in Forest Grove, Oregon. The Department of Forestry determined that their equipment was not the cause ...