Mount Merapi subduction zone, where the Indo-Australian Plate is subducting under the Sunda Plate. It is one of at least 129 active volcanoes in Indonesia, part of the volcano is located in the Southeastern part of the Pacific Ring of Fire–a section of fault lines stretching from the Western Hemisphere through Japan and South East Asia. Stratigraphic analysis reveals that eruptions in the Merapi area began about 400,000 years ago, and from then until about 10,000 years ago, eruptions were typically effusive, and the out flowing lava emitted was basaltic. Since then, eruptions have become more explosive, with viscous andesitic lavas often
USS Merapi (AF-38) Galveston Dry Dock Co., "Merapi" hastened through shakedown and departed Mobile, Alabama, 11 April, for the Pacific Ocean war zone. Specializing in refrigerated stores, she sailed via Pearl Harbor to Kerama Retto, Okinawa where in the midst of numerous air alerts she unloaded 14 to 19 June. Having retired to Pearl Harbor for more supplies she got underway again on 20 July and spent the final month of the war at Eniwetok Atoll disbursing cargo. In the postwar period "Merapi" provided logistic support for U.S. occupation forces, initially using Auckland, New Zealand, as her supply base. Spending much of 1946