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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.
East Beach in Ocean View, along the Chesapeake Bay. Ocean View is a coastal region in the independent city of Norfolk, Virginia in the United States.It has several miles of shoreline on the Chesapeake Bay to the north, starting with Willoughby Spit to the west and the Joint Expeditionary Base -- Little Creek in the independent city of Virginia Beach on the east.
Download QR code; Print/export Download as PDF; ... Unidentified sounds (11 P) U. Unidentified flying objects (5 C, ... Mobile view; Search.
In response, the CIA formed the Robertson Panel which advised Project Blue Book to "strip the Unidentified Flying Objects of the special status they have been given and the aura of mystery they have unfortunately acquired." [107] [108] [109] 1952-07-14 Nash-Fortenberry UFO sighting: United States; Norfolk, Virginia
A 1973 report cites a university study of fifty cases of people complaining about a "low throbbing background noise" that others were unable to hear. The sound, always peaking between 30 and 40 Hz (hertz), was found to only be heard during cool weather with a light breeze, and often early in the morning. These noises were often confined to a 10 ...
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