Dempo

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  • Indonesia
  • Sumatra
  • Stratovolcano(es)
  • 2009 CE
  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 4.03°S
  • 103.13°E

  • 3173 m
    10407 ft

  • 261230
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

18 March-24 March 2009

On 23 March, CVGHM lowered the Alert Level for Dempo from 2 to 1 (on a scale of 1-4) based on visual observations of the crater lake during 5-6 January and 2-4 March, and decreased seismicity since a phreatic eruption on 1 January. Visitors and residents were advised not to go within a 1-km radius of the summit.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) also known CVGHM



 Available Weekly Reports


2009: March
2008: December
2006: September


18 March-24 March 2009

On 23 March, CVGHM lowered the Alert Level for Dempo from 2 to 1 (on a scale of 1-4) based on visual observations of the crater lake during 5-6 January and 2-4 March, and decreased seismicity since a phreatic eruption on 1 January. Visitors and residents were advised not to go within a 1-km radius of the summit.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) also known CVGHM


31 December-6 January 2009

CVGHM reported that on 1 January, a phreatic eruption from Dempo resulted in a strong sulfur odor and "ash rain" that was noted as far as about 10 km from the summit. Fog prevented direct observations of the summit. The Alert Level was raised to 2 (on a scale from 1-4). Visitors and residents were advised not to go within a 2-km radius of the summit.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) also known CVGHM


20 September-26 September 2006

Increased seismicity at Dempo resulted in an elevation of the hazard status to Alert Level 2.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) also known CVGHM


Summary of eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
2009 Jan 1 2009 Jan 1 Confirmed 1 Historical Observations
2006 Sep 25 2006 Sep 25 Confirmed 1 Historical Observations
1994 Oct 1994 Oct Confirmed 1 Historical Observations
1974 Feb 26 1974 Oct 20 Confirmed 2 Historical Observations
1973 Jan 24 1973 Jan 25 Confirmed 2 Historical Observations
1964 Feb 14 1964 Feb 14 Confirmed 2 Historical Observations
1940 Jul Unknown Confirmed 2 Historical Observations
1939 Dec 19 1940 Feb 21 Confirmed 2 Historical Observations
1939 Jul 18 1939 Jul 30 Confirmed 2 Historical Observations
1936 Nov 26 1936 Nov 27 Confirmed 2 Historical Observations
1934 Jan 24 1934 Apr 25 Confirmed 2 Historical Observations
1926 Apr 22 1926 Apr 24 Confirmed 2 Historical Observations
1923 May 19 (?) 1923 May 19 (?) Confirmed 1 Historical Observations
1921 Apr 1921 Apr Confirmed 1 Historical Observations
1908 Feb 16 1908 Feb 17 Confirmed 2 Historical Observations
1905 Unknown Confirmed 0 Historical Observations
1900 Oct 26 1900 Oct 27 Confirmed 2 Historical Observations
1900 Jun 4 1900 Jun 4 Confirmed 2 Historical Observations
1895 Jul 2 1895 Sep 30 Confirmed 2 Historical Observations
1884 Jun 1884 Jul Confirmed 2 Historical Observations
1881 Dec 1881 Dec Confirmed 2 Historical Observations
1881 Feb 16 Unknown Confirmed 2 Historical Observations
1880 May Unknown Confirmed 2 Historical Observations
1879 May 18 Unknown Confirmed 2 Historical Observations
1853 Jan 1 Unknown Confirmed 2 Historical Observations
1839 (?) Unknown Confirmed 2 Historical Observations
1817 Dec 31 ± 365 days Unknown Confirmed 2 Historical Observations

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.

Dempo is a prominent 3173-m-high stratovolcano that rises above the Pasumah Plain of SE Sumatra. The andesitic Dempo volcanic complex has two main peaks, Gunung Dempo and Gunung Marapi, constructed near the SE rim of a 3 x 5 km caldera breached to the north. The one called Dempo is slightly lower, with an elevation of 3049 m and lies at the SE end of the summit complex. The taller Marapi cone, with a summit elevation 3173 m, was constructed within a crater cutting the older Gunung Dempo edifice. Remnants of 7 craters are found at or near the summit of the complex, with volcanism migrating to the WNW with time. The large, 800 x 1100 m wide historically active summit crater cuts the NW side of Gunung Marapi (not to be confused with Marapi volcano 500 km to the NW in Sumatra) and contains a 400-m-wide lake located at the far NW end of the crater complex. Historical eruptions have been restricted to small-to-moderate explosive activity that produced ashfall near the volcano.