Report on Marapi (Indonesia) — March 1980
Scientific Event Alert Network Bulletin, vol. 5, no. 3 (March 1980)
Managing Editor: David Squires
Marapi (Indonesia) Two small plumes
Please cite this report as:
Global Volcanism Program, 1980. Report on Marapi (Indonesia). In: Squires, D (ed.), Scientific Event Alert Network Bulletin, 5:3. Smithsonian Institution. http://dx.doi.org/10.5479/si.GVP.SEAN198003-261140.
0.381°S, 100.473°E; summit elev. 2891 m
All times are local (unless otherwise noted)
Plumes rose 700 m from Marapi at 0627 and 0755 on 29 March, then were blown S by the wind. No further activity had occurred as of 2 April.
Geologic Background. 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 2000 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.
Information Contacts: A. Sudradjat and L. Pardyanto, VSI.