Lewotobi

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  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 8.542°S
  • 122.775°E

  • 1703 m
    5586 ft

  • 264180
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

28 March-3 April 2012

CVGHM reported that seismicity at Lewotobi Lakilaki, one of two stratovolcanoes comprising Lewotobi, fluctuated but declined overall during 18 September 2011-25 March 2012. No significant changes were observed at the volcano. The Alert Level was lowered to 1 (on a scale of 1-4) on 29 March.

Observers of Lewotobi Perempuan, the second stratovolcano comprising Lewotobi, noted that during January-March diffuse white plumes rose 15 m above the crater and no significant changes had occurred. After 31 August 2011 through 25 March 2012 seismicity fluctuated but declined overall. On 29 March the Alert Level was lowered to 1.

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



 Available Weekly Reports


2012: March
2011: August | September
2009: March
2008: May
2003: June | July | August | October
2002: October


28 March-3 April 2012

CVGHM reported that seismicity at Lewotobi Lakilaki, one of two stratovolcanoes comprising Lewotobi, fluctuated but declined overall during 18 September 2011-25 March 2012. No significant changes were observed at the volcano. The Alert Level was lowered to 1 (on a scale of 1-4) on 29 March.

Observers of Lewotobi Perempuan, the second stratovolcano comprising Lewotobi, noted that during January-March diffuse white plumes rose 15 m above the crater and no significant changes had occurred. After 31 August 2011 through 25 March 2012 seismicity fluctuated but declined overall. On 29 March the Alert Level was lowered to 1.

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


21 September-27 September 2011

CVGHM raised the Alert Level for Lewotobi Lakilaki, one of two stratovolcanoes composing Lewotobi, to 2 (on a scale of 1-4) on 22 September due to increased seismicity since 17 September and visual observations. Although no significant changes in the volcano were observed, diffuse white plumes rose 15 m above the crater. Visitors and residents were prohibited from going within a 1-km radius of Lewotobi Lakilaki.

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


31 August-6 September 2011

CVGHM reported that during 26-31 August seismicity at Lewotobi increased. Plumes of "smoke" rose 15-50 m above the Lewotobi Perampuan crater rim; no other significant changes were visibly apparent. Based on the seismic data, the Alert Level was raised to 2 (on a scale of 1-4) on 31 August. Visitors and residents were advised not to approach the volcano within 1 km of the Lewotobi Perampuan crater.

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


18 March-24 March 2009

On 23 March, CVGHM lowered the Alert Level for Lewotobi from 2 to 1 (on a scale of 1-4) based on visual observations and decreased seismicity during March. Rarely seen diffuse white plumes rose 25 m above the crater and drifted E. Visitors and residents were advised not to approach the crater.

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


28 May-3 June 2008

On 29 May, CVGHM raised the Alert Level for Lewotobi to 2 (on a scale of 1-4) due to an increase in seismicity during 12-29 May. White plumes typically rose about 25 m above the crater and drifted E; visual observations indicated no changes.

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


29 October-4 November 2003

A decrease in volcanic activity at Lewotobi during 13-19 October led DVGHM to decrease the Alert Level from 2 to 1 (on a scale of 1-4). Only gas was emitted to low levels and no volcanic earthquakes were recorded.

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


27 August-2 September 2003

The Darwin VAAC reported that an eruption at Lewotobi on 1 September produced an ash plume to a height of ~2.5 km above the summit that drifted W. Volcanic material caused fires in forests within a 1 km radius of the crater and damaged crops on the volcano's flanks. VSI raised the Alert Level to 4, the highest level. According to news articles, hundreds of people from at least six villages fled their homes for the village of Konga to the E. By 2 September the Alert Level had been reduced to 3.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC), Agence France-Presse (AFP)


2 July-8 July 2003

Low-level ash emissions continued at Lewotobi during 2-29 June. During 2-8 June ash plumes reached ~300 m above the summit, and ash fell in the villages of Bawalatang, Duang, and Boru. Lewotobi remained at Alert Level 2 (on a scale of 1-4).

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


11 June-17 June 2003

On 30 May at 1650 an ash explosion at Lewotobi Lakilaki, a stratovolcano of Lewotobi, sent an ash column to a height of ~200 m above the summit. Ash fell at the observatory post about 5 km from the crater. As of 1 June, Lewotobi was at Alert Level 2 (on a scale of 1-4).

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


9 October-15 October 2002

On 12 October at 2330 there was an explosion at Lewotobi Lakilaki, a stratovolcano of Lewotobi, that was accompanied by a weak thundering sound. Ash fell as far as 5 km away and an ash column rose ~500 m above the volcano. According to VSI, eruptions at Lewotobi usually occur over an extended period of time, therefore they expect more explosions to take place in the next couple of weeks to months. On 16 October, Lewotobi was at Alert Level 4 (the highest level).

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
2003 May 30 2003 Sep 1 (in or after) Confirmed 2 Historical Observations Lewotobi Lakilaki
2002 Oct 12 2002 Oct 12 (?) Confirmed 1 Historical Observations Lewotobi Lakilaki
1999 Mar 31 1999 Jul 1 (?) Confirmed 2 Historical Observations Lewotobi Lakilaki
1991 May 11 1992 Dec 31 (in or after) Confirmed 1 Historical Observations Lewotobi Lakilaki
1990 Jan 28 1990 Jun Confirmed 1 Historical Observations Lewotabi Lakilaki
1971 Jan Unknown Confirmed 2 Historical Observations Lewotobi Lakilaki
1970 Unknown Confirmed 2 Historical Observations Lewotobi Lakilaki
1968 Nov 28 1969 Feb 2 Confirmed 2 Historical Observations Lewotobi Lakilaki
1939 Dec 17 1940 Apr 21 Confirmed 2 Historical Observations Lewotobi Lakilaki
1935 Dec 1935 Dec 25 (in or after) Confirmed 2 Historical Observations Lewetobi Perempuan
1932 May 23 1933 Dec 26 ± 5 days Confirmed 3 Historical Observations Lewotobi Lakilaki
1921 Jan 1 1921 Dec 20 Confirmed 2 Historical Observations Lewotobi Perempuan
1914 Jun 29 Unknown Confirmed 2 Historical Observations Lewotobi Lakilaki
1909 Jan 8 1910 May 26 Confirmed 2 Historical Observations Lewotobi Lakilaki
1907 Sep 28 1907 Oct 30 Confirmed 3 Historical Observations Lewotobi Lakilaki
1889 Unknown Confirmed 2 Historical Observations Lewotobi Lakilaki
1869 Jul 7 1869 Jul 27 Confirmed 2 Historical Observations Lewotobi Lakilaki
1868 Dec 15 Unknown Confirmed 2 Historical Observations Lewotobi Lakilaki
1868 Jul 13 (in or before) Unknown Confirmed 2 Historical Observations Lewotobi Lakilaki
1865 May 4 Unknown Confirmed 2 Historical Observations Lewotobi Lakilaki
1861 May 4 1861 May 18 Confirmed 2 Historical Observations Lewotobi Lakilaki
[ 1859 Jul ] [ Unknown ] Uncertain     Lewotobi Lakilaki
1675 ± 25 years Unknown Confirmed 3 Historical Observations Lewotobi Lakilaki

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.

Kemmerling G L L, 1929. Vulkanen van Flores. Vulk Seism Meded Dienst Mijnw Ned-Indie, 10: 1-138.

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.

Stolz A J, Varne R, Davies, G R, Wheller G E, Foden J D, 1990. Magma source components in an arc-continent collision zone: the Flores-Lembata sector, Sunda arc, Indonesia. Contr Mineral Petr, 105: 585-601.

Wheller G E, Varne R, Foden J D, Abbott M J, 1987. Geochemistry of Quaternary volcanism in the Sunda-Banda arc, Indonesia, and three-component genesis of island-arc basaltic magmas. J Volc Geotherm Res, 32: 137-160.

The Lewotobi "husband and wife" twin volcano (also known as Lewetobi) in eastern Flores Island is composed of the Lewotobi Lakilaki and Lewotobi Perempuan stratovolcanoes. Their summits are less than 2 km apart along a NW-SE line. The conical 1584-m-high Lewotobi Lakilaki has been frequently active during the 19th and 20th centuries, while the taller and broader 1703-m-high Lewotobi Perempuan has erupted only twice in historical time. Small lava domes have grown during the 20th century in the crescentic summit craters of both volcanoes, which are open to the north. A prominent flank cone, Iliwokar, occurs on the east flank of Lewotobi Perampuan.