Johnston Atoll territory claimed by United States of America
Geography
Johnston Atoll is a 1,300-hectare (3,200-acre) atoll in the North Pacific Ocean, located about 750 nautical miles (1,390 km; 860 mi) southwest of the island of Hawaiʻi, and is grouped as one of the United States Minor Outlying Islands. The atoll, which is located on a coral reef platform, has four islands. Johnston Island and Sand Island are both enlarged natural features, while Akau (North) and Hikina (East) are two artificial islands formed by coral dredging. By 1964, dredge and fill operations had increased the size of Johnston Island to 596 acres (241 ha) from its original 46 acres (19 ha), increased the size of Sand Island from 10 to 22 acres (4.0 to 8.9 ha), and added the two new islands, North and East, of 25 and 18 acres (10.1 and 7.3 ha) respectively.The four islands compose a total land area of 2.67 square kilometers (1.03 square miles). Due to the atoll's tilt, much of the reef on the southeast portion has subsided. But even though it does not have an encircling reef crest, the reef crest on the northwest portion of the atoll does provide for a shallow lagoon, with depths ranging from 3 to 10 m (10 to 33 ft).