![]() Since 2009 it has been part of the Pacific Remote Islands Marine National Monument. Contaminated soil is now stored in a landfill. #Johnston atoll series#In the 1950s and 60s the United States conducted a series of nuclear tests there, causing some radioactive contamination of the atoll the area was also a chemical and biological weapons storage and incineration site. Navy control from 1934 and Air Force control after 1948, now jointly with the Dept. The 1.03 square miles deserted island is approximately 750 nautical miles southwest of Hawaii, and it’s currently grouped as one of the U.S. territory situated in the North Pacific Ocean. A bird sanctuary since the 1920s, the strategic island was under U.S. Where Is Johnston Atoll Johnston Atoll flag. companies exploited the island for guano until the 1880s. Johnston Atoll was discovered by Americans in 1796, or the British in 1807, and was claimed by both the United States and the Kingdom of Hawaii in 1858 it was not, however, included in the state of Hawaii. The atoll is the site of a wildlife refuge. During the 1960s and 70s, it was the site of numerous high altitude nuclear test launches, including Operation Dominic, in which plutonium was scattered across the island from one of the failed Thor rockets. The largest island, Johnston Island, c.3,000 ft (910 m) long and c.600 ft (180 m) wide, has been significantly expanded with dredged fill. Johnston Island (also referred to as Johnston Atoll) is a decommissioned US Naval base 800 miles west of Hawaii. Johnston Atoll, atoll, 2.8 sq mi (7.25 sq km), central Pacific, c.700 nautical mi (1,300 km) SW of Honolulu, central Pacific, an uninc. Johnston Atoll is an uninhabited 1,300 ha (3,200 acres) atoll in the North Pacific Ocean located about 750 nmi (860 mi 1,390 km) southwest of the island of Hawaii and is grouped as one of the United States Minor Outlying Islands. ![]()
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