Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 26 September-2 October 2012
Managing Editor: Sally Sennert
Please cite this report as:
Global Volcanism Program, 2012. Report on Marapi (Indonesia) (Sennert, S, ed.). Weekly Volcanic Activity Report, 26 September-2 October 2012. Smithsonian Institution and US Geological Survey. https://volcano.si.edu/showreport.cfm?gvpvar=GVP.WVAR20120926-261140
According to news articles, an eruption from Marapi on 26 September produced an ash plume that rose 1.5 km above the crater.
Source: Big Pond News
Geological Summary. Gunung Marapi, not to be confused with the better-known Merapi volcano on Java, is Sumatra's most active volcano. This massive complex stratovolcano rises 2,000 m above the Bukittinggi Plain in the Padang Highlands. A broad summit contains multiple partially overlapping summit craters constructed within the small 1.4-km-wide Bancah caldera. The summit craters are located along an ENE-WSW line, with volcanism migrating to the west. More than 50 eruptions, typically consisting of small-to-moderate explosive activity, have been recorded since the end of the 18th century; no lava flows outside the summit craters have been reported in historical time.
Marapi