Indonesia

Halmahera Arc Volcanoes, Indonesia

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Telomoyo volcano, also spelled Telemojo, was constructed over the southern flank of the eroded Pleistocene Soropati volcano and is in part of Holocene age (van Bemmelen 1941). It lies along a NNW-SSE-trending line of volcanoes extending from Ungaran in the north to Merapi in the south. The eastern flank of Soropati volcano collapsed during the Pleistocene, leaving a U-shaped depression. Telomoyo subsequently filled much of the southern side of this depression and grew to a height of 600 m above its rim. Telomoyo has had no historic eruptions. (SI/USGS)

Space Shuttle photo STS049-097-054 taken in May 1992 and looking northeast across Tambora.

Tambora is a stratovolcano, forming the Sanggar peninsula of Sumbawa Island. The diameter of the volcano at sea-level is about 38 miles (60 km). Prior to the 1815 eruption, the volcano may have been as tall as 13,000 feet (4,000 m). The 1815 eruption formed a caldera about 4 miles (6 km) in diameter. The caldera is 3,640 feet (1,110 m) deep.