Located 520 kilometers (323 miles) north of Saipan, Maug is actually three islands that were once part of the rim of a volcano now partially submerged. Where the volcano cone was is now a deep and spacious natural harbor. Steep cliffs border the islands and the landscape on the north and west islands is dominated by columns of basalt resembling tombstones. Highest point North Island, 227 meters (746 feet). Size: 2 square kilometers (0.8 square miles). Uninhabited. For an example of studies on these IBM volcanoes, see Shaw et al., 2008.
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Investigator: David Hilton
Chief Scientist: Tobias Fischer