CVGHM lowered the Alert Level for Sorikmarapi on 30 December from 2 to 1 (on a scale of 1-4).

28 December 2011              Back to Top

CVGHM lowered the Alert Level for Sorikmarapi on 30 December from 2 to 1 (on a scale of 1-4).

Sources: Center of Volcanology and Geological Hazard Mitigation (CVGHM)

7 December 2011              Back to Top

CVGHM reported increased seismicity from Sorik Marapi during 1-12 December and white plumes rose 40-50 m above the summit. CVGHM raised the Alert Level on 12 December from 1 to 2 (on a scale of 1-4) based on seismic data.

Sources: Center of Volcanology and Geological Hazard Mitigation (CVGHM)

Below is a summary of eruption dates and Volcanic Explosivity Indices (VEI).

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Kusumadinata K, 1979. {Data Dasar Gunungapi Indonesia}. Bandung: Volc Surv Indonesia, 820 p

Neumann van Padang M, 1951. Indonesia. {Catalog of Active Volcanoes of the World and Solfatara Fields}, Rome: IAVCEI, 1: 1-271

Rock N M S, Aldiss D T, Aspden J A, Clarke M C G, Djunuddin A, Kartawa W, Miswar S J, Thompson R, Whandoyo, 1983. Geologic map of the Lubuksikaping quadrangle, Sumatra. {Geol Res Devel Centre Indonesia}, 1:250,000 map and 60 p text

Rock N M S, Syah H H, Davis A E, Hutchison D, Styles M T, Lena R, 1982. Permian to Recent volcanism in northern Sumatra, Indonesia: a preliminary study of its distribution, chemistry, and peculiarities. {Bull Volc}, 45: 127-152

Sorikmarapi is a forested stratovolcano with a 600-m-wide summit crater containing a crater lake and substantial sulfur deposits. A smaller parasitic crater (Danau Merah) on the upper SE flank also contains a crater lake; these two craters and a series of smaller explosion pits occur along a NW-SE line. Several solfatara fields are located on the eastern flank. Phreatic eruptions have occurred from summit and flank vents during the 19th and 20th centuries.