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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 duration each.
Unidentified drones have been reported in the United States for several years prior to current 2024 reports. [25] In late 2019 and 2020, there was a wave of reports of sightings over Colorado and Nebraska. [26] [27] In December 2023, multiple unidentified drone incursions were reported at Langley Air Force Base in Virginia.
Moneymaker said the October 2023 incident was deemed credible after ruling that species known in the area would not have been able to emit the “strange unidentified sound” that was reported.
Pages in category "Unidentified sounds" The following 11 pages are in this category, out of 11 total. This list may not reflect recent changes. ...
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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.
Upsweep is an unidentified 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 .
In the shocking absence of a federal explanation for the phenomenon local politicians, police, and drone analysts have all come up with their own theories.