Ulawun

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  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 5.05°S
  • 151.33°E

  • 2334 m
    7656 ft

  • 252120
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

1 January-7 January 2014

RVO reported that activity at Ulawun was low during 16-31 December; diffuse ash plumes rose from the crater during 51-21 December, and white vapor emissions were visible during 22-31 December.

Source: Rabaul Volcano Observatory (RVO)



 Available Weekly Reports


2014: January
2013: July | September | November | December
2012: May | November | December
2011: February | May
2010: February | May | June | July | August | November
2009: May
2008: June | July
2007: January | April | December
2006: March | April | May | August | November | December
2005: March | April | May | June | August | November
2004: April | June | August
2003: February | April | May | June | September | October
2002: February | August | September | October
2001: January | April | May | July | September | October


1 January-7 January 2014

RVO reported that activity at Ulawun was low during 16-31 December; diffuse ash plumes rose from the crater during 51-21 December, and white vapor emissions were visible during 22-31 December.

Source: Rabaul Volcano Observatory (RVO)


18 December-24 December 2013

RVO reported that activity at Ulawun was low during 1-15 December; pale gray ash plumes rose from the crater. People between Sena Estate and Noau on the N flank reported ashfall in early December.

Source: Rabaul Volcano Observatory (RVO)


27 November-3 December 2013

RVO reported that activity at Ulawun was low during 16-30 November. Small volumes of gray to gray-brown ash plumes rose 100 m from the crater on most days and drifted S. On 21 November ashfall was reported in Navo on the SW flank.

Source: Rabaul Volcano Observatory (RVO)


20 November-26 November 2013

Based on analyses of satellite imagery, the Darwin VAAC reported that on 26 November an ash plume from Ulawun rose to an altitude of 3.7 km (12,000 ft) a.s.l. and drifted 30 km NW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


13 November-19 November 2013

RVO reported that during 1 October-15 November activity at Ulawun was low; small volumes of white vapor and gray and gray-brown ash plumes rose 100 m above the crater and drifted S. Seismicity was low with RSAM values fluctuating between 100 and 150 units throughout the period.

Source: Rabaul Volcano Observatory (RVO)


4 September-10 September 2013

RVO reported that activity at Ulawun was low during 4-31 August; emissions from the summit crater consisted of white vapor until 16 August, and were gray during 17-31 August. Emissions were more energetic on 24 August, rising 200 m. A single booming noise and weak incandescence was also reported that day. RSAM values fluctuated but decreased overall.

Source: Rabaul Volcano Observatory (RVO)


31 July-6 August 2013

RVO reported that activity at Ulawun was low during 22 July-4 August; emissions from the summit crater consisted of white vapor. Seismicity was also low. RSAM values decreased from 80 on 21 July to 50 on 31 July, and then began to increase on early 2 August. By 4 August RSAM values reached 600, attributed to an increase in volcanic tremor.

Source: Rabaul Volcano Observatory (RVO)


17 July-23 July 2013

RVO reported that activity at Ulawun was low during 15-21 July. Emissions from the summit crater were light gray during 15-16 July, and then changed to white vapor during 17-21 July. RSAM from volcanic tremors had increased on 14 July and reached a peak of 700 just after 0300 on 15 July. RSAM then decreased to 80 on 21 July, which also marked the cessation of volcanic tremors.

Source: Rabaul Volcano Observatory (RVO)


10 July-16 July 2013

RVO reported that activity at Ulawun was low during 1-14 July. Emissions from the summit crater consisted of white vapor during 1-7 July, and then changed to occasionally sub-continuous, light gray ash clouds during 8 and 11-14 July. Ash clouds changed to gray-brown on 14 July.

Seismic activity was low from 1 July through the early part of 13 July. RSAM increased from about 0700 on 14 July onwards with the emergence of continuous volcanic tremors until it reached a peak of 700 just after 0300 on 15 July. RVO noted that the last significant volcanic tremors at Ulawun were recorded in May and June 2012.

Source: Rabaul Volcano Observatory (RVO)


12 December-18 December 2012

RVO reported that dense gray-brown ash plumes that began rising from Ulawun on 6 November ceased on 11 December. During 12-16 December variable amounts of white vapor plumes rose from the crater.

Source: Rabaul Volcano Observatory (RVO)


5 December-11 December 2012

RVO reported that dense gray-brown ash plumes continued to rise 200 m from Ulawun during 1-7 December. Ashfall was reported on the NW flanks, in Ubili (10 km NW) and Ulamona (10 km NW). A small landslide scar appeared near the N valley flank vent, reportedly caused by movement of a large boulder and loose material, triggered by a M 6.1 earthquake that occurred near Pomio (55 km SSE) on 19 November.

Source: Rabaul Volcano Observatory (RVO)


28 November-4 December 2012

RVO reported that starting on 6 November through 30 November Ulawun produced pale grey and brown ash plumes that rose 200 m and drifted in multiple directions. Ashfall was reported on the N and NW flanks, in Voluvolu, Noau, Ubili (10 km NW), and Ulamona (10 km NW). Low rumbling was heard on 18 November.

Source: Rabaul Volcano Observatory (RVO)


30 May-5 June 2012

RVO reported that during 1-6 and 10-26 May white plumes rose above Ulawun's summit crater, and during 7-9 and 27-31 May gray-brown ash plumes rose from the crater.

Source: Rabaul Volcano Observatory (RVO)


25 May-31 May 2011

RVO reported that during 23-27 May gray ash plumes rose above Ulawun's summit crater. Fine ash fell in Ubili and Ulamona on the NW flank on 26 May.

Source: Rabaul Volcano Observatory (RVO)


18 May-24 May 2011

RVO reported that during 19-22 May gray-to-brown ash plumes rose above Ulawun and fine ash fell on the NW and W flanks. Weak, fluctuating incandescence was observed on 22 May.

Source: Rabaul Volcano Observatory (RVO)


11 May-17 May 2011

RVO reported that during 13-14 and 17 May gray-to-brown ash plumes rose above Ulawun. On 17 May the emissions were forceful for a short time and booming noises were reported. Light ashfall was reported in areas between Ubili in the NW and Voluvolu in the NE.

Source: Rabaul Volcano Observatory (RVO)


4 May-10 May 2011

RVO reported that during 1-9 May diffuse white plumes rose from Ulawun and Real-time Seismic-Amplitude Measurement (RSAM) values ranged between 70 and 100. During 9-10 May RSAM values distinctly increased, fluctuated, and peaked at 1300 units before declining back to 100 units. During this time local residents heard booming. On 10 May grey-to-brown ash plumes were observed.

Source: Rabaul Volcano Observatory (RVO)


23 February-1 March 2011

RVO reported that mild activity from Ulawun that began in May 2010 continued during 1 January-28 February. The activity was characterized by brown-to-gray ash plumes that rose less than 500 m and produced fine ashfall to the SE. Sulfur dioxide plumes drifted SE on 5 and 31 January. During 23-26 February gray ash plumes occasionally drifted NE, SW, and NW.

Source: Rabaul Volcano Observatory (RVO)


24 November-30 November 2010

Based on analyses of satellite imagery and information from RVO, the Darwin VAAC reported that on 26 November an ash plume from Ulawun rose to an altitude of 3.7 km (12,000 ft) a.s.l. and drifted 55 km NE.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


18 August-24 August 2010

RVO reported that white and gray-to-brown plumes rose no more than a few hundred meters above Ulawun during 12-24 August, and fine ash fell on the NW and W flanks. Seismicity continued to decrease as compared to previous weeks.

Source: Rabaul Volcano Observatory (RVO)


11 August-17 August 2010

RVO reported that white and gray-to-brown plumes rose no more than 300 m above Ulawun during 6-12 August, and fine ash fell on the NW and W flanks. Seismicity decreased as compared to previous weeks.

Source: Rabaul Volcano Observatory (RVO)


28 July-3 August 2010

RVO reported that white vapor plumes rose 300 m above Ulawun during 21-29 July. Light brownish ash clouds were observed on 23 and 24 July.

Source: Rabaul Volcano Observatory (RVO)


21 July-27 July 2010

RVO reported that diffuse gray plumes rose 200-500 m above Ulawun during 16-21 July. Volcanic tremors continued, but overall seismicity declined slightly. Real-time Seismic-Amplitude Measurement (RSAM) values remained at a moderate level.

Source: Rabaul Volcano Observatory (RVO)


7 July-13 July 2010

RVO reported that white-to-gray plumes rose less than 500 m from Ulawun during 27 June-9 July, and fine ash fell in areas to the SW, W, and NW. Occasional roaring noises were heard on 28 June and during 5-6 July. A slight increase in seismicity (above moderate levels) indicated by overlapping tremors and Real-time Seismic-Amplitude Measurement (RSAM) values was noted during 5-8 July.

Source: Rabaul Volcano Observatory (RVO)


30 June-6 July 2010

Based on analyses of satellite imagery, the Darwin VAAC reported that during 1 and 2-5 July ash plumes from Ulawun drifted 55-195 km at an altitude of 3 km (10,000 ft) a.s.l.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


23 June-29 June 2010

RVO reported that white-to-gray plumes rose from Ulawun during 23-25 June and fine ash fell on the SW and NW flanks. Low rumbling was heard and dull fluctuating incandescence was observed for a brief period of time from the SE. During 25-26 June white to gray-brown plumes rose 600 m. Seismicity, dominated by volcanic tremor, remained at a moderate level until 26 June, when Real-time Seismic-Amplitude Measurement (RSAM) values declined.

Source: Rabaul Volcano Observatory (RVO)


16 June-22 June 2010

RVO reported that during 16-17 June white and gray plumes from Ulawun rose 1 km high. Fine ash fell on the SW, W, and NW flanks. Low rumbling noises were heard from the S and SE flanks, and weak fluctuating incandescence was observed for a brief period of time. On 18 and 19 June, white-to-gray plumes rose from the crater, and roaring noises were reported from the NW flank. Seismicity increased to a high level and was dominated by volcanic tremor. During 19-20 June continuing white and gray emissions produced plumes that rose 1 km. Fine ashfall was seen on the NW and SW flanks. Fluctuating incandescence was seen from the S and SE flanks and occasional low roaring noises were noted. Seismicity declined to moderate levels on 20 June.

Source: Rabaul Volcano Observatory (RVO)


9 June-15 June 2010

RVO reported that during 9-16 June white and gray plumes from Ulawun rose 800-900 m high. Fine ashfall was reported almost daily and affected the NW, W, and SW flanks. During 9-12 June occasional rumbling noises were reported. Fluctuating incandescence from the crater was seen at night on 9 and 10 June from observers in areas to the SW and for a brief period of time on 13 June from areas N.

Source: Rabaul Volcano Observatory (RVO)


2 June-8 June 2010

RVO reported that during 2-7 June occasional low roaring or rumbling noises from Ulawun were heard daily in areas on the ESE, SE, and S flanks. During 2-5 June white vapor plumes rose 800-900 m high. Very fine ash particles fell in Ulamona about 10 km NW on 3 June and some gray emissions rose from the volcano on 5 June. Emissions during 6-9 June were white and light gray, and continued to rise no higher than 900 m. Fluctuating incandescence from the crater was seen at night from the S side of the volcano. Ashfall was again reported in Ulamona on 8 June.

Source: Rabaul Volcano Observatory (RVO)


26 May-1 June 2010

RVO reported that during 22-28 May Ulawun emitted thick white vapor plumes that rose 800 m high. Some areas of the plumes were gray on 22 and 25 May. People on the S and SE sides of the island heard "low jetting" noises during 24-25 May. Weak and fluctuating incandescence was seen at night during 28-29 May by people on the S part of the island. The emissions changed color to gray on 29 May and continued similarly the next two days. On 30 May very fine ashfall was reported in areas to the SSW, S, and SSE. On 1 and 2 June only white vapor emissions were noted. RVO recommended to the WNB Provincial Disaster Committee to declare a Stage 1 Alert to reflect an increasing trend of seismic energy, and a recent presence of occasional gray plumes, incandescence, and audible noises from Ulawun.

Source: Rabaul Volcano Observatory (RVO)


19 May-25 May 2010

RVO reported that during 1-20 May Ulawun emitted variable amounts of white vapor. Based on analyses of satellite imagery, the Darwin VAAC reported that during 22-25 May ash plumes drifted 35-130 km at an altitude of 3 km (10,000 ft) a.s.l.

Sources: Rabaul Volcano Observatory (RVO), Darwin Volcanic Ash Advisory Centre (VAAC)


17 February-23 February 2010

RVO reported that during 12-20 February Ulawun emitted white vapor that was occasionally forceful. A plume seen on satellite imagery on 14 February drifted NNE.

Source: Rabaul Volcano Observatory (RVO)


10 February-16 February 2010

Based on analyses of satellite imagery, the Darwin VAAC reported that during 14-15 February ash plumes from Ulawun drifted 45-95 km at altitudes of 2.4-3.7 km (8,000-12,000 ft) a.s.l.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


13 May-19 May 2009

RVO reported that white vapor plumes from Ulawun's summit crater were emitted on 10 May and rose a maximum height of 1.5 km. During 10-12 May, occasional roaring and rumbling noises were reported by villagers on the SE and S sides of the volcano. Weak fluctuating incandescence was also seen by people on the S side.

Source: Rabaul Volcano Observatory (RVO)


2 July-8 July 2008

RVO reported that white vapor plumes from Ulawun were emitted during 2-6 July. Seismicity was low to moderate; seismometers continued to recorded high-frequency earthquakes. The Alert status remained at "Stage 2," indicating that seismic levels remained above background. During 2-3 July occasional roaring noises were reported.

Source: Rabaul Volcano Observatory (RVO)


25 June-1 July 2008

RVO reported that increased seismic activity at Ulawun began on 7 June. During 18 June-2 July, mostly moderate-to-strong emissions of white vapor produced plumes that rose from Ulawun and seismometers recorded high-frequency earthquakes. On 22 June, noises heard in villages to the NE accompanied some of the earthquakes. On 28 June, an Intensity II earthquake was felt in areas nearby and accompanied by a booming noise. A team of officers from RVO and West New Britain Provincial Disaster Office informed communities on the activity status of Ulawun. On 30 June, RVO reported that the level of Alert at Ulawun was at "Stage 2", or that there was an increase in seismic activity above background level. During 1-2 July, roaring and jet noises were reported by people to the NE.

Source: Rabaul Volcano Observatory (RVO)


19 December-25 December 2007

Based on observations of satellite imagery, the Darwin VAAC reported that an ash-and-steam plume from Ulawun drifted W on 25 December.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


25 April-1 May 2007

Based on satellite imagery and information from the Rabaul Volcano Observatory, the Darwin VAAC reported that diffuse plumes from Ulawun drifted N on 28 April. On 1 May, an ash plume rose to an altitude of 4 km (13,000 ft) a.s.l. and drifted W.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


17 January-23 January 2007

Based on a pilot report, the Darwin VAAC reported that an ash plume from Ulawun rose to an altitude of 2.4 km (8,000 ft) a.s.l. on 18 January and drifted SW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


3 January-9 January 2007

The Darwin VAAC reported that diffuse steam-and-ash plumes from Ulawun were visible on satellite imagery drifting SW on 4 January.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


20 December-26 December 2006

The Darwin VAAC reported that ash plumes from Ulawun were visible on satellite imagery on 21, 22, and 25 December drifting ENE, NW, and SW, respectively.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


6 December-12 December 2006

Based on satellite imagery, the Darwin VAAC reported that diffuse plumes from Ulawun reached altitudes of 4 km (13,000 ft) a.s.l. on 9 December. Plumes on 11 December reached unreported altitudes.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


29 November-5 December 2006

Based on satellite imagery, the Darwin VAAC reported a diffuse ash-and-steam plume from Ulawun on 29 November and an ash plume on 4 December. The altitudes and drift directions were not reported.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


22 November-28 November 2006

Based on satellite imagery, the Darwin VAAC reported a diffuse plume from Ulawun on 22 November and an ash-and-steam plume on 28 November.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


15 November-21 November 2006

Based on satellite imagery, the Darwin VAAC reported that during 16-17 November diffuse plumes from Ulawun drifted N and NW. An ash-and-steam plume was visible on 18 November.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


8 November-14 November 2006

Based on satellite imagery, the Darwin VAAC reported that on 12 November a diffuse plume from Ulawun reached an altitude of 4.6 km (15,000 ft) a.s.l. and drifted NW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


30 August-5 September 2006

Based on satellite imagery, the Darwin VAAC reported that ash-and-steam plumes from Ulawun drifted SW and S on 30 August and 2 September, respectively.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


23 August-29 August 2006

The Darwin VAAC reported steam-and-ash plumes from Ulawun that were visible on satellite imagery on 25, 27, and 28 August. The plumes reached altitudes of 3.7 km (12,000 ft) a.s.l. and drifted NW, W, and SW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


9 August-15 August 2006

According to the Darwin VAAC, an ash-and-steam plume from Ulawun that was reported on 15 August by the US Air Force Weather Agency rose to an altitude of ~3.7 km (~12,000 ft.) a.s.l. The plume was also visible on satellite imagery.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


31 May-6 June 2006

On 31 May, a thin steam-and-ash plume from Ulawun reached an altitude of below 3 km (10,000 ft) a.s.l.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


24 May-30 May 2006

On 25 May, the Darwin VAAC reported a thin steam-and-ash plume from Ulawun that extended 30 miles WNW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


10 May-16 May 2006

On 14 May, an ash plume from Ulawun of unknown height was visible on satellite imagery.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


5 April-11 April 2006

A small low-level plume emitted from Ulawun was visible on satellite imagery extending W on 9 April.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


22 March-28 March 2006

Based on a pilot report, the Darwin VAAC reported that ash from Ulawun was visible at a height of ~3 km (10,000 ft) a.s.l. Ash was not visible on satellite imagery due to meteorological clouds around the volcano.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


1 March-7 March 2006

RVO reported that activity during 1-2 March at Ulawun consisted of strong forcefully expelled "gray-blue emissions" from the main crater. Incandescence may have been visible at the base of the plumes. There were no emissions from the NW vent. Small felt earthquakes occurred and the sound of roaring was heard from nearby villages. According to the Darwin VAAC, RVO reported that activity increased at Ulawun during 1 and 2 March and ash reached ~3 km (10,000 ft) a.s.l. on the 1st. Ash was not visible on satellite imagery.

Sources: Rabaul Volcano Observatory (RVO), Darwin Volcanic Ash Advisory Centre (VAAC)


23 November-29 November 2005

A thin plume emitted from Ulawun was visible extending N on satellite imagery on 23 November.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


17 August-23 August 2005

Volcanic activity remained at low levels at Ulawun during 15-21 August, with steam emitted from the summit crater. Seismicity was at low levels, consisting of small low-frequency earthquakes.

Source: Rabaul Volcano Observatory (RVO) via the Darwin Volcanic Ash Advisory Center


29 June-5 July 2005

During 30 June to 1 July, thin ash plumes from Ulawun were visible on satellite imagery. The plume heights were not reported.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


22 June-28 June 2005

A short plume was visible in satellite imagery at ~3 km (9,800 ft) a.s.l. during 22-27 June and on 27 June a pilot report noted that the plume extended 37 km (20 nautical miles).

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


15 June-21 June 2005

On 21 June, a small ash plume from Ulawun was visible on satellite imagery extending NW of the volcano's summit. The height of the plume was not reported.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


1 June-7 June 2005

On 3, 6, and 7 June plumes from Ulawun were visible on satellite imagery. The heights of the plumes were not reported.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


18 May-24 May 2005

Satellite imagery on 19 May showed a small plume from Ulawun at an unknown height extending W.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


6 April-12 April 2005

On 6 April, a thin plume from Ulawun was visible extending ~55 km to the SW on satellite imagery.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


23 March-29 March 2005

During 25-28 March, volcanic and seismic activity at Ulawun were at low levels. Gas was emitted from the main crater, and low-frequency earthquakes were recorded beneath the volcano. Small-amplitude continuous volcanic tremor was recorded during 27-28 March.

Source: Rabaul Volcano Observatory (RVO)


9 March-15 March 2005

RVO advised the Darwin VAAC that volcanic activity was relatively low at Ulawun on 8 March, but seismicity was increasing. On 15 March a faint plume was visible on satellite imagery

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


18 August-24 August 2004

According to the Darwin VAAC, a thin ash plume emitted from Ulawun on 23 August rose ~3 km above the volcano and drifted SW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


11 August-17 August 2004

According to the Darwin VAAC, a thin plume emitted from Ulawun was visible on satellite imagery at a height of ~3 km a.s.l. on 14 and 15 August.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


30 June-6 July 2004

During 2-6 July, thin plumes from Ulawun were visible on satellite imagery at heights around 3 km a.s.l. extending as far as ~90 km.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


2 June-8 June 2004

On 6 June, satellite imagery of Ulawun showed a plume up to 3 km a.s.l. and extending ~75 km NW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


14 April-20 April 2004

On 14 April, the Darwin VAAC reported that Ulawun emitted an ash plume that rose to ~3 km a.s.l. and extended ~37 km NE.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


7 April-13 April 2004

RVO reported that volcanic activity was at low levels at Ulawun during 15 March to 1 April. Only white vapor was emitted from the main summit crater and there were no emissions from the north valley vent. The overall level of seismicity was low, with only small low-frequency volcanic earthquakes recorded. Electric tiltmeter measurements showed a long-term inflationary trend. According to the Darwin VAAC, on 12 and 13 April thin ash plumes from Ulawun were visible on satellite imagery at a height of ~700 m above the volcano. The plumes extended ~75 km E and NE.

Sources: Rabaul Volcano Observatory (RVO), Darwin Volcanic Ash Advisory Centre (VAAC)


8 October-14 October 2003

An ash plume from Ulawun was visible on satellite imagery on 10 October at an altitude around 3 km, extending ~75 km WNW of the summit.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


1 October-7 October 2003

On 5 October a faint ash plume was visible on satellite imagery at a height of ~4.3 km a.s.l., extending 55 km WSW of the summit.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


17 September-23 September 2003

An ash plume from Ulawun was visible on satellite imagery on 22 September at a height of ~3.7 km a.s.l. The plume extended toward the NW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


18 June-24 June 2003

On 19 and 20 June faint ash plumes from Ulawun were visible on satellite imagery.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


28 May-3 June 2003

During 12-27 May, Ulawun's main summit crater continued to emit weak-to-moderate volumes of white vapor and the N valley vent was quiet with no emissions observed. A slight increase in seismicity occurred during 18-23 May. According to the Darwin VAAC, on 1 June at 0925 a thin, low-level plume was observed on satellite imagery. By 1325 it was no longer visible.

Source: Rabaul Volcano Observatory (RVO)


30 April-6 May 2003

During this week, aviation sources reported Ulawun ash plumes. A 30 April volcanic ash advisory detected a possible narrow low-level plume extending ~50 km from Ulawun. Satellite imagery for 2 May indicated an ash-and-steam plume rising to ~4 km and blowing W at ~30 km/hour. The plume extended 80 km W of the summit.

Sources: US Air Force Weather Agency, Darwin Volcanic Ash Advisory Centre (VAAC)


9 April-15 April 2003

The Darwin VAAC reported that a possible low-level ash plume was visible on satellite imagery on 14 April.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


26 February-4 March 2003

Volcanic and seismic activity remained at low levels during 17-26 February at Ulawun, with the emission of low-to-moderate volumes of steam. There were no emissions from the north valley vent. Heavy rain on 19, 21, 22, and 24 February led to the reactivation of mudflows on Ulawun's flanks. Residents in the affected areas were evacuated.

Source: Rabaul Volcano Observatory (RVO) via the Darwin Volcanic Ash Advisory Center


30 October-5 November 2002

A pilot reported seeing ash from Ulawun on 3 November drifting ESE of the volcano at a height of ~3 km a.s.l.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


16 October-22 October 2002

The Darwin VAAC reported that on 16 October a low-level ash plume from Ulawun was visible on satellite imagery. The plume drifted to the N.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


2 October-8 October 2002

A low-level ash plume from Ulawun was visible on satellite imagery on 1 October. The plume drifted to the NE.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


25 September-1 October 2002

On 28 September around 0400 an eruption occurred at Ulawun that produced an ash-and-steam cloud to ~3.7 km a.s.l. The cloud was visible on satellite imagery at 0632 drifting WSW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


18 September-24 September 2002

On 19 September at 0700 a low-level ash plume from Ulawun was visible on satellite imagery.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


11 September-17 September 2002

On 12 September at 0700 a low-level ash plume located NNW to NNE of Ulawun was visible on satellite imagery. By 1132 the plume was no longer visible.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


4 September-10 September 2002

On 7 September a low-level (less than ~3.6 km a.s.l.) ash plume was visible on satellite imagery, extending to the NW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


28 August-3 September 2002

The Darwin VAAC reported that on 28 August at 0732 a low-level ash cloud from an eruption at Ulawun was visible on satellite imagery. By 1532 the same day ash was no longer visible. According to a news article, ash eruptions had occurred on 26 August and during the previous week, but became larger on the 27th. As of the 28th, care centers were preparing for possible evacuations.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC), Papua New Guinea Post-Courier Online


20 February-26 February 2002

During 11-24 February, activity at Ulawun's summit vent remained low, and volcanic tremor was recorded. Weak-to-moderate vapor plumes were emitted from the summit vent, and on the 21st weak roaring noises were heard and a weak red glow was briefly visible. During mid-February tremor increased to moderate levels for the first time since December 2001. After 22 February tremor returned to background levels.

Source: Rabaul Volcano Observatory (RVO)


10 October-16 October 2001

Volcanic tremor, which had been occurring at moderate-to-high levels during the previous 2 weeks, dropped dramatically on 11 October. After 11 October seismicity only consisted of discrete low-frequency earthquakes. On 8 and 9 October loud roaring noises emanated from the volcano. A deflationary trend continued to be detected.

Source: Rabaul Volcano Observatory (RVO)


26 September-2 October 2001

Volcanic tremor occurred at Ulawun on 24 September at 2200 through 30 September. After the tremor peaked on the 27th at about 1000 it fluctuated as it generally declined. By 30 September seismic activity was at moderate levels. During 27-30 September a very slow deflationary trend was detected.

Source: Rabaul Volcano Observatory (RVO)


11 July-17 July 2001

A news report on 9 July stated that residents who were evacuated from their homes near Ulawun were permitted to return home. They were evacuated in May after the occurrence of relatively high seismic activity and an eruption in April. On 14 June, almost a month before the news report was published, the Rabaul Volcano Observatory (RVO) recommended that the Alert Level be reduced to 1. At this stage of alert people could move back to their homes with the approval of the local disaster committee, but many residents were hesitant to return and opted to stay in care centers. After the aforementioned news article was published some people returned home and RVO expects more people to return to their villages in the coming weeks.

Sources: Rabaul Volcano Observatory (RVO), The National


2 May-8 May 2001

Based on information from the Rabaul Volcanological Observatory, the Darwin VAAC stated that no eruptions of Ulawun had been reported since the 30 April event, though cloudy conditions have inhibited clear views of the volcano. Limited evacuations occurred on 3 May due to the possibility of further volcanic activity. Ulawun is at stage 2 alert.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


25 April-1 May 2001

According to the Darwin VAAC, a pilot reported observing a "smoke" cloud produced from Ulawun at 0730 on 30 April. The cloud was at an altitude of ~9 km a.s.l. and drifting to the NW and SW. Satellite imagery indicated that the cloud may have reached ~13.7 km a.s.l. and that the eruption ceased by ~1530 on 30 April. The Rabaul Volcanological Observatory stated that Ulawun is at a high alert level and further eruptions are possible.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)


17 January-23 January 2001

On 16 January the Darwin VAAC reported that a NOTAM from Port Moresbly stated that Ulawun was emitting a cloud, ashes, and "flames" up to 10.6 km a.s.l. blowing towards the SE. In contrast, an ash cloud was not detected in satellite imagery, and the Papua New Guinea Volcano Observatory stated that recent volcanic activity was limited to low-level vapor emissions.

Source: 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
2013 Jul 8 2013 Aug 31 (in or after) Confirmed 1 Historical Observations
2012 Nov 6 2012 Dec 11 Confirmed 1 Historical Observations
2012 May 7 2012 May 31 Confirmed 1 Historical Observations
2010 May 26 ± 4 days 2011 May 27 Confirmed 2 Historical Observations
[ 2007 Dec 25 ] [ Unknown ] Uncertain 1  
2007 May 1 2007 May 1 Confirmed 2 Historical Observations
2006 Mar 1 2007 Jan 18 Confirmed 2 Historical Observations
2005 Mar 27 (?) 2005 Aug 9 (?) Confirmed 2 Historical Observations
2004 Apr 12 2004 Apr 14 Confirmed 2 Historical Observations
2003 Apr 14 (?) 2003 Oct 10 Confirmed 2 Historical Observations
2002 Aug 22 (?) 2002 Nov 3 Confirmed 2 Historical Observations
2001 Aug 28 2001 Aug 28 Confirmed 2 Historical Observations
2001 Jan 16 (?) 2001 May 3 Confirmed 3 Historical Observations Summit and NNE flank
2000 Sep 28 2000 Nov 1 Confirmed 4 Historical Observations
1999 Oct 20 1999 Oct 20 Confirmed 1 Historical Observations
1994 Apr 19 (?) 1994 Jun Confirmed 1 Historical Observations
1993 Jan 12 1993 Jan 31 (?) Confirmed 2 Historical Observations
1989 Jan 1 1989 Dec (?) Confirmed 2 Historical Observations
1985 Nov 17 1985 Nov 22 Confirmed 3 Historical Observations
1984 Dec 30 1985 Jan 27 Confirmed 1 Historical Observations
1984 Aug 23 1984 Sep 11 Confirmed 1 Historical Observations
1983 Nov 6 1984 Mar 13 Confirmed 1 Historical Observations
1980 Oct 6 1980 Oct 7 Confirmed 3 Historical Observations
1978 May 7 1978 May 14 Confirmed 3 Historical Observations Summit, lower east flank
1973 Oct 4 1973 Oct 19 Confirmed 2 Historical Observations
1970 Jan 15 1970 Feb 11 Confirmed 3 Historical Observations
1967 Jan 22 1967 Dec 28 Confirmed 2 Historical Observations
1963 Mar 17 1963 May 2 (?) Confirmed 2 Historical Observations
1960 Jul 29 ± 3 days 1962 Nov Confirmed 2 Historical Observations
1958 Feb 1 ± 60 days Unknown Confirmed 2 Historical Observations
[ 1951 ] [ Unknown ] Uncertain    
1941 Jan 26 1941 Jan 26 Confirmed 2 Historical Observations
[ 1937 May ] [ Unknown ] Uncertain    
1927 Jul 1927 Sep 17 (in or after) Confirmed 2 Historical Observations
1919 May 28 (?) Unknown Confirmed 2 Historical Observations
1918 Jul 21 (?) Unknown Confirmed 2 Historical Observations
1915 Apr Unknown Confirmed 3 Historical Observations
[ 1912 ] [ Unknown ] Discredited    
1898 Unknown Confirmed 3 Historical Observations
1878 Unknown Confirmed 2 Historical Observations
1700 Mar 11 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.

Cooke R J S, 1981c. Notes on the activity of Ulawun volcano, 1700-1958: results of literature search. Geol Surv Papua New Guinea Mem, 10: 147-152.

Cooke R J S, Baldwin J T, Sprod T J, 1976. Recent volcanoes and mineralization in Papua New Guinea. 25th Internatl Geol Cong, Sydney, Excur Guide, 53: 1-30.

Fisher N H, 1957. Melanesia. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 5: 1-105.

Johnson R W, 1987. Large-scale volcanic cone collapse: the 1888 slope failure of Ritter volcano, and other examples from Papua New Guinea. Bull Volc, 49: 669-679.

Johnson R W, Davies R A, White A J R, 1972. Ulawun volcano, New Britain. Aust Bur Min Resour Geol Geophys Bull, 142: 1-42.

Silver E, Day S, Ward S, Hoffmann G, Llanes P, Driscoll N, Appelgate B, Saunders S, 2009. Volcano collapse and tsunami generation in the Bismarck Volcanic Arc, Papua New Guinea. J Volc Geotherm Res, 186: 210-222.

The symmetrical basaltic-to-andesitic Ulawun stratovolcano is the highest volcano of the Bismarck arc, and one of Papua New Guinea's most frequently active. Ulawun volcano, also known as the Father, rises above the north coast of the island of New Britain across a low saddle NE of Bamus volcano, the South Son. The upper 1000 m of the 2334-m-high Ulawun volcano is unvegetated. A prominent E-W-trending escarpment on the south may be the result of large-scale slumping. Satellitic cones occupy the NW and eastern flanks. A steep-walled valley cuts the NW side of Ulawun volcano, and a flank lava-flow complex lies to the south of this valley. Historical eruptions date back to the beginning of the 18th century. Twentieth-century eruptions were mildly explosive until 1967, but after 1970 several larger eruptions produced lava flows and basaltic pyroclastic flows, greatly modifying the summit crater.