Latest (2025) | 2024 | Aug-Dec 2023
Ulawun volcano (Papua New Guinea) - Smithsonian / USGS Weekly Volcanic Activity Report for 20 August-26 August 2025 (Continuing Activity)
Wednesday, Aug 27, 2025 | 2 months ago · VN
The Rabaul Volcano Observatory (RVO) reported that activity at Ulawun was low during 1-20 August. Summit emissions occasionally observed during periods of clearer weather were characterized as white w…The Rabaul Volcano Observatory (RVO) reported that activity at Ulawun was low during 1-20 August. Summit emissions occasionally observed during periods of clearer weather were characterized as white with variable densities; weather clouds obscured views of the summit on most days. There were reports of brief periods of minor summit incandescence observed from the Bakada and Likuranga areas to the …Open article
Ulawun volcano (Papua New Guinea) - Smithsonian / USGS Weekly Volcanic Activity Report for 23 April-29 April 2025 (New Activity / Unrest)
Wednesday, Apr 30, 2025 | 6 months ago · VN
The Rabaul Volcano Observatory (RVO) reported that activity at Ulawun was low during 7-25 April. Summit emissions were white and had variable densities. On some days there were no emissions.
Brief low …The Rabaul Volcano Observatory (RVO) reported that activity at Ulawun was low during 7-25 April. Summit emissions were white and had variable densities. On some days there were no emissions.
Brief low rumbling sounds were heard during 15-16 and 19 April. In general seismicity was low, though slightly higher that background (RSAM values of 100-200). Data from the seismic station (UULA), 2.8 km from …Open article
Brief low …The Rabaul Volcano Observatory (RVO) reported that activity at Ulawun was low during 7-25 April. Summit emissions were white and had variable densities. On some days there were no emissions.
Brief low rumbling sounds were heard during 15-16 and 19 April. In general seismicity was low, though slightly higher that background (RSAM values of 100-200). Data from the seismic station (UULA), 2.8 km from …Open article
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Ulawun volcano (Papua New Guinea) - Smithsonian / USGS Weekly Volcanic Activity Report for 16 April-22 April 2025 (New Activity / Unrest)
Wednesday, Apr 23, 2025 | 7 months ago · VN
The Darwin Volcanic Ash Advisory Centre (VAAC) reported that a possible ash plume at Ulawun was observed by a pilot at 0730 on 21 April and rose to 3.7 km (12,000 ft) a.s.l. and drifted S. Weather clouds obscured satellite views.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
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From: Global Volca…Open article
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
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From: Global Volca…Open article
Ulawun Volcano Volcanic Ash Advisory: VA TO FL120 REPORTED AT 20/2130Z MOV S OBS VA DTG: 21/0510Z to 12000 ft (3700 m)
Monday, Apr 21, 2025 | 7 months ago · VN
Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 12000 ft (3700 m) altitude or flight level 120 .
The full report is …Open article
The full report is …Open article
Ulawun Volcano Volcanic Ash Advisory: VA TO FL120 REPORTED AT 20/2130Z MOV S EST VA DTG: 20/2220Z to 12000 ft (3700 m)
Sunday, Apr 20, 2025 | 7 months ago · VN
Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 12000 ft (3700 m) altitude or flight level 120 .
The full report is …Open article
The full report is …Open article
Ulawun volcano (Papua New Guinea) - Smithsonian / USGS Weekly Volcanic Activity Report for 16 April-22 April 2025 (New Activity / Unrest)
Thursday, Apr 17, 2025 | 7 months ago · VN
The Darwin Volcanic Ash Advisory Centre (VAAC) reported that a possible ash plume at Ulawun was observed by a pilot at 0730 on 21 April and rose to 3.7 km (12,000 ft) a.s.l. and drifted S. Weather clouds obscured satellite views.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
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From: Global Volca…Open article
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
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From: Global Volca…Open article
Ulawun volcano (Papua New Guinea) - Smithsonian / USGS Weekly Volcanic Activity Report for 16 April-22 April 2025 (New Activity / Unrest)
Thursday, Apr 17, 2025 | 7 months ago · VN
The Darwin Volcanic Ash Advisory Centre (VAAC) reported that a possible ash plume at Ulawun was observed by a pilot at 0730 on 21 April and rose to 3.7 km (12,000 ft) a.s.l. and drifted S. Weather clouds obscured satellite views.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
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From: Global Volca…Open article
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
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From: Global Volca…Open article
Ulawun volcano (Papua New Guinea) - Smithsonian / USGS Weekly Volcanic Activity Report for 2 April-8 April 2025 (New Activity / Unrest)
Wednesday, Apr 9, 2025 | 7 months ago · VN
The Rabaul Volcano Observatory (RVO) reported that activity at Ulawun was low during 1-7 April. Summit emissions were characterized as white, having variable densities, and containing small amounts of ash. The plumes drifted S and caused minor ashfall in areas within a few km to the S and SW of the …The Rabaul Volcano Observatory (RVO) reported that activity at Ulawun was low during 1-7 April. Summit emissions were characterized as white, having variable densities, and containing small amounts of ash. The plumes drifted S and caused minor ashfall in areas within a few km to the S and SW of the volcano.
Low rumbling noises were heard in those same areas on 1 and 4 April. Seismicity generally remained low. The seismic station (UULA), 2.8 km from the summit on the lower WSW flank, recorded small low- and high-frequency volcanic earthquakes, with low-frequency earthquakes being the dominant signal.
Starting at about 0800 on 4 April the seismic signals quickly changed to continuous volcanic tr…Open article
Low rumbling noises were heard in those same areas on 1 and 4 April. Seismicity generally remained low. The seismic station (UULA), 2.8 km from the summit on the lower WSW flank, recorded small low- and high-frequency volcanic earthquakes, with low-frequency earthquakes being the dominant signal.
Starting at about 0800 on 4 April the seismic signals quickly changed to continuous volcanic tr…Open article
Ulawun volcano (Papua New Guinea) - Smithsonian / USGS Weekly Volcanic Activity Report for 26 March-1 April 2025 (New Activity / Unrest)
Thursday, Apr 3, 2025 | 7 months ago · VN
The Rabaul Volcano Observatory (RVO) reported that at 0800 on 27 March a dense, dark-gray ash plume rose 2-3 km above the Ulawun’s summit and drifted S. Two seismic stations, located 10 km NW and 6 km from the volcano, indicated that seismicity remained low, though small, low-frequency earthquakes w…The Rabaul Volcano Observatory (RVO) reported that at 0800 on 27 March a dense, dark-gray ash plume rose 2-3 km above the Ulawun’s summit and drifted S. Two seismic stations, located 10 km NW and 6 km from the volcano, indicated that seismicity remained low, though small, low-frequency earthquakes within background noise were detected by both stations. Increase seismicity was detected at the station 10 km NW in Real-time Seismic-Amplitude Measurement (RSAM) data 1-2 hours before the eruptive event, peaked about 30 minutes after the event, and then decreased to near-background levels about three hours later.
RVO noted that the ash event was likely over, though seismic data suggested that there…Open article
RVO noted that the ash event was likely over, though seismic data suggested that there…Open article
Ulawun Volcano Volcanic Ash Advisory: VA REPORTED TO FL100 MOV WSW AT 26/2130Z EST VA DTG: 26/2250Z
Wednesday, Mar 26, 2025 | 8 months ago · VN
Volcanic Ash Advisory Center Darwin (VAAC) issued the following report:
FVAU04 at 23:12 UTC, 26/03/25 from ADRM
VA ADVISORY
DTG: 20250326/2312Z
VAAC: DARWIN
VOLCANO: ULAWUN 252120
PSN: S0503 E15120
AREA: PAP…Open article
FVAU04 at 23:12 UTC, 26/03/25 from ADRM
VA ADVISORY
DTG: 20250326/2312Z
VAAC: DARWIN
VOLCANO: ULAWUN 252120
PSN: S0503 E15120
AREA: PAP…Open article
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Ulawun (Papua New Guinea) volcano - Smithsonian / USGS Weekly Volcanic Activity Report for 27 November-3 December 2024 (New Activity / Unrest)
Wednesday, Dec 4, 2024 | 11 months ago · VN
The Rabaul Volcano Observatory (RVO) reported that seismicity at Ulawun was low during 1-19 November, dominated by very small low-frequency earthquakes occurring at short intervals. Seismicity increased on 19 November and remained elevated during the rest of the month. High-frequency volcano-tectoni…The Rabaul Volcano Observatory (RVO) reported that seismicity at Ulawun was low during 1-19 November, dominated by very small low-frequency earthquakes occurring at short intervals. Seismicity increased on 19 November and remained elevated during the rest of the month. High-frequency volcano-tectonic earthquakes began to occur at around 1300 on 19 November; the number of those events increased at 1645 and again at 0000 on 20 November.
At around 1800 on 20 November low-amplitude non-harmonic volcanic tremor emerged and a slight increase in the amplitude of those signals began a couple of hours later. Seismicity fluctuated at elevated levels until 0900 on 28 November; during brief periods of re…Open article
At around 1800 on 20 November low-amplitude non-harmonic volcanic tremor emerged and a slight increase in the amplitude of those signals began a couple of hours later. Seismicity fluctuated at elevated levels until 0900 on 28 November; during brief periods of re…Open article
Ulawun (Papua New Guinea) volcano - Smithsonian / USGS Weekly Volcanic Activity Report for 20 November-26 November 2024 (New Activity / Unrest)
Wednesday, Nov 27, 2024 | 11 months ago · VN
The Rabaul Volcano Observatory (RVO) reported that seismicity at Ulawun increased at around 1600 on 19 November and was characterized as an increase in the magnitude of events resembling volcano-tectonic signals. Signals indicating volcanic tremors increased at around 1830 on 20 November, increased …Open article
Ulawun (Papua New Guinea) volcano - Smithsonian / USGS Weekly Volcanic Activity Report for 20 November-26 November 2024 (New Activity / Unrest)
Thursday, Nov 21, 2024 | 12 months ago · VN
The Rabaul Volcano Observatory (RVO) reported that seismicity at Ulawun increased at around 1600 on 19 November and was characterized as an increase in the magnitude of events resembling volcano-tectonic signals. Signals indicating volcanic tremors increased at around 1830 on 20 November, increased …Open article
Ulawun volcano (New Britain, Papua New Guinea) - Smithsonian / USGS Weekly Volcanic Activity Report for 3 January-9 January 2024 (Continuing Activity)
Wednesday, Jan 10, 2024 | 1 year ago · VN
Rabaul Volcano Observatory (RVO) reported that activity at Ulawun was low during 6 December 2023-9 January 2024. During periods of good visibility white steam plumes of variable densities were seen rising from the summit crater. On 19 December visibility was poor, though during a brief clear period,…Rabaul Volcano Observatory (RVO) reported that activity at Ulawun was low during 6 December 2023-9 January 2024. During periods of good visibility white steam plumes of variable densities were seen rising from the summit crater. On 19 December visibility was poor, though during a brief clear period, observers noted brown-tinged steam plumes.
On 31 December residents of Noau Village photographed dense brown ash plumes rising a few hundred meters above the summit and drifting W, and a small pyroclastic flow descending the NNE flank. The Alert Level remained at Stage 1 (on the four-level scale).
Source: Rabaul Volcano Observatory (RVO)
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From: Global Volcanism Program, 2024. Report on Ulawun. In:…Open article
On 31 December residents of Noau Village photographed dense brown ash plumes rising a few hundred meters above the summit and drifting W, and a small pyroclastic flow descending the NNE flank. The Alert Level remained at Stage 1 (on the four-level scale).
Source: Rabaul Volcano Observatory (RVO)
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From: Global Volcanism Program, 2024. Report on Ulawun. In:…Open article
Ulawun Volcano Volcanic Ash Advisory: VA TO FL090 OBS AT 05/2100Z MOV NE OBS VA DTG: 05/2100Z to 9000 ft (2700 m)
Friday, Jan 5, 2024 | 1 year ago · VN
Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 9000 ft (2700 m) altitude or flight level 090 .
The full report is a…Open article
The full report is a…Open article
Ulawun volcano (New Britain, Papua New Guinea) - Smithsonian / USGS Weekly Volcanic Activity Report for 27 December-2 January 2024 (Continuing Activity)
Wednesday, Jan 3, 2024 | 1 year ago · VN
According to the Darwin VAAC a webcam image at Ulawun showed a pyroclastic flow descending a flank at 1230 on 31 December. An ash plume possibly rose to 2.7 km (9,000 ft) a.s.l. and drifted NE based on similar previous plumes and weather models; weather clouds prevented satellite views.
Source: Darwi…Open article
Source: Darwi…Open article
Ulawun Volcano Volcanic Ash Advisory: VA REPORTED TO FL090 MOV NE AT 31/0230Z OBS VA DTG: 31/0705Z
Sunday, Dec 31, 2023 | 1 year ago · VN
Volcanic Ash Advisory Center Darwin (VAAC) issued the following report:
FVAU01 at 07:05 UTC, 31/12/23 from ADRM
VA ADVISORY
DTG: 20231231/0720Z
VAAC: DARWIN
VOLCANO: ULAWUN 252120
PSN: S0503 E15120
AREA: PAP…Open article
FVAU01 at 07:05 UTC, 31/12/23 from ADRM
VA ADVISORY
DTG: 20231231/0720Z
VAAC: DARWIN
VOLCANO: ULAWUN 252120
PSN: S0503 E15120
AREA: PAP…Open article
Ulawun volcano (New Britain, Papua New Guinea) - Smithsonian / USGS Weekly Volcanic Activity Report for 6 December-12 December 2023 (New Activity / Unrest)
Wednesday, Dec 13, 2023 | 1 year ago · VN
According to ReliefWeb, the U.S. Agency for International Development (USAID) reported that the 20 November eruption at Ulawun resulted in five deaths and the evacuation of more than 16,000 people, with many more affected, as of 9 December. Ashfall from the eruption impacted oil palm trees, water so…Open article
Ulawun volcano (New Britain, Papua New Guinea) - Smithsonian / USGS Weekly Volcanic Activity Report for 6 December-12 December 2023 (New Activity / Unrest)
Thursday, Dec 7, 2023 | 1 year ago · VN
According to ReliefWeb, the U.S. Agency for International Development (USAID) reported that the 20 November eruption at Ulawun resulted in five deaths and the evacuation of more than 16,000 people, with many more affected, as of 9 December. Ashfall from the eruption impacted oil palm trees, water so…Open article
Ulawun volcano (New Britain, Papua New Guinea) - Smithsonian / USGS Weekly Volcanic Activity Report for 22 November-28 November 2023 (New Activity / Unrest)
Wednesday, Nov 29, 2023 | 1 year ago · VN
Rabaul Volcano Observatory (RVO) reported that white steam plumes and occasional puffs of ash rose from Ulawun’s summit crater during 22-24 November, though weather clouds hindered views during 23-24 November. Lava continued to flow from a new fissure vent that had opened on the SW flank, near the v…Rabaul Volcano Observatory (RVO) reported that white steam plumes and occasional puffs of ash rose from Ulawun’s summit crater during 22-24 November, though weather clouds hindered views during 23-24 November. Lava continued to flow from a new fissure vent that had opened on the SW flank, near the vent that had formed in 2019. The intensity of the incandescence from the flow decreased during 23-24 November, suggesting that effusion may have slowed.
Seismicity remained at background levels. The Alert Level remained at Stage 2 (on the four-level scale).
Source: Rabaul Volcano Observatory (RVO)
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From: Global Volcanism Program, 2023. Report on Ulawun. In: Mayberry, G (ed.), Weekly Volcanic Activi…Open article
Seismicity remained at background levels. The Alert Level remained at Stage 2 (on the four-level scale).
Source: Rabaul Volcano Observatory (RVO)
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From: Global Volcanism Program, 2023. Report on Ulawun. In: Mayberry, G (ed.), Weekly Volcanic Activi…Open article
