Atoll Atoll An atoll (, , , , or ), sometimes called a coral atoll, is a ring-shaped coral reef including a coral rim that encircles a lagoon partially or completely. There may be coral islands or cays on the rim. The coral of the atoll often sits atop the rim of an extinct seamount or volcano which has eroded or subsided partially beneath the water. The lagoon forms over the volcanic crater or caldera while the higher rim remains above water(s) or at shallow depths that permit the coral to grow and form the reefs. For the atoll to persist,
Kure Atoll to restore the atoll to a more natural state. Jean-Michel Cousteau produced a video on a voyage to Kure which first aired in 2006. Since 2010 the Division of Forestry and Wildlife has had a year-round presence on Kure Atoll. Because of its particularly remote location, Kure Island has been the scene of several amateur radio DX expeditions, or DX-peditions. Because the radio propagation path between Kure and Europe runs right over the North Polar region, opportunities for distant communication with Kure are particularly popular among European amateurs. Some of the DXpeditions to Kure were: Kure Atoll The International Date