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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.
A map of Jekyll Island from 1983. Jekyll Island is one of only four Georgia barrier islands that has a paved causeway to allow access from the mainland by car. It has 5,700 acres (23 km 2) of land, including 4,400 acres (18 km 2) of solid earth and a 240-acre (0.97 km 2) Jekyll Island Club Historic District.
St. Simons Sound is a sound in Georgia that prevails between Jekyll Island and St. Simons Island. It is part of the waterway from the Atlantic Ocean to the South Brunswick River to the port at Brunswick, Georgia. The St. Simons lighthouse stands on the north side of the sound. The depth of the sound is determined to be 32 feet (9.8 m) through a ...
St. Simons Island is the largest of the Golden Isles, with a permanent population of 12,743 as of the 2010 census. Reachable via the F. J. Torras Causeway, the Island is a tourist destination for its beaches, water sports, boating and fishing, golf, nature trails, historical landmarks, shopping, restaurants and nightlife.
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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.
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The St. Simons Lighthouse, along with the northernmost water tower on Jekyll Island, creates the demarcation line that separates St. Simons Sound from the Atlantic Ocean. The lighthouse is a picturesque and beloved symbol of St. Simons Island and Glynn County, Georgia. It is the subject of many paintings and other artistic renderings. [7]