Ruang

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  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 2.3°N
  • 125.37°E

  • 725 m
    2378 ft

  • 267010
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

30 October-5 November 2002

During 21-27 October, a thick low-level ash plume infrequently rose above Ruang. Rainfall on 23 October caused lahars to flow down the volcano's flanks during 1445-1545. Ruang remained at Alert Level 2 (on a scale of 1-4).

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



 Available Weekly Reports


2002: September | October


30 October-5 November 2002

During 21-27 October, a thick low-level ash plume infrequently rose above Ruang. Rainfall on 23 October caused lahars to flow down the volcano's flanks during 1445-1545. Ruang remained at Alert Level 2 (on a scale of 1-4).

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


25 September-1 October 2002

VSI reported that following the 25 September Ruang eruption there was no significant volcanic activity; only thin white clouds rose 100 m above the summit. On 30 September VSI decreased the Alert Level at Ruang from 4 to 3 (on a scale of 1-4).

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) also known CVGHM, Darwin Volcanic Ash Advisory Centre (VAAC)


18 September-24 September 2002

VSI increased the Alert Level at Ruang to 4 (the highest level) when the volcano began to erupt on 25 September at 0100. During the 7-hour eruption an ash cloud rose 0.5-1 km above the summit. Ruang erupted again at 1140, producing an ash cloud that VSI reported rose to 5 km above the summit. According to the Darwin VAAC, satellite imagery revealed that an ash cloud reached ~16 km above the volcano. People living near the volcano at desa Pumpente and desa Laimpatehi were evacuated.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) also known CVGHM, Darwin Volcanic Ash Advisory Centre (VAAC)


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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
2002 Sep 25 2002 Sep 29 (?) Confirmed 4 Historical Observations
[ 1996 Jun 27 ] [ Unknown ] Uncertain    
1949 Jan 5 1949 Jan 19 (in or after) Confirmed 2 Historical Observations
[ 1946 Oct 13 ] [ 1946 Oct 15 ] Discredited    
[ 1940 Apr ] [ Unknown ] Discredited    
[ 1918 Feb ] [ Unknown ] Discredited    
1914 May 29 1915 Feb 28 ± 30 days Confirmed 2 Historical Observations
1904 Apr 22 1905 May 27 Confirmed 3 Historical Observations
1889 Jun Unknown Confirmed 1 Historical Observations
1874 Nov 15 Unknown Confirmed 2 Historical Observations
1871 Mar 2 1871 Mar 14 Confirmed 2 Historical Observations
1870 Aug 27 1870 Aug 28 Confirmed 3 Historical Observations
1856 Sep Unknown Confirmed 1 Historical Observations
1840 Unknown Confirmed 2 Historical Observations
1836 Apr 22 (?) 1836 Apr 24 (?) Confirmed 2 Historical Observations
1808 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.

Morrice M G, Jezek P A, Gill J B, Whitford D J, Monoarfa M, 1983. An introduction to the Sangihe arc: volcanism accompanying arc-arc collision in the Molucca Sea, Indonesia. J Volc Geotherm Res, 19: 135-165.

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

Neumann van Padang M, 1959. Changes in the top of Mount Ruang (Indonesia). Geol en Mijnbouw, 21: 113-118.

Ruang volcano, not to be confused with the better known Raung volcano on Java, is the southernmost volcano in the Sangihe Island arc, north of Sulawesi Island. The 4 x 5 km island volcano rises to 725 m across a narrow strait SW of the larger Tagulandang Island. The summit of Ruang volcano contains a crater partially filled by a lava dome initially emplaced in 1904. Explosive eruptions recorded since 1808 have often been accompanied by lava dome formation and pyroclastic flows that have damaged inhabited areas.