Volcanic activity worldwide 19 Dec 2025: Fuego volcano, Popocatépetl, Soputan, Talang, Merapi, Brom…

Canlaon (Central Philippines): The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported that the eruption continued at Kanlaon on 18 December 2025 (local). The alert level remained at „2 – Moderate Level of Volcanic Unrest“ (level 2 on a 0–5 level scale).
Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
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Current Alerts:
Observatory alert level: „2 – Moderate Level of Volcanic Unrest“ (level 2 on a 0–5 level scale)

Taal (Luzon, Philippines): The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported that the eruption continued at Taal on 18 December 2025 (local). The alert level remained at „1 – Low-Level Unrest“ (on a 0–5 level scale).
Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
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Current Alerts:
Observatory alert level: „1 – Low-Level Unrest“ (on a 0–5 level scale)

Mayon (Luzon Island, Philippines): The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported that unrest continued at Mayon on 18 December 2025 (local). The alert level remained at „1 – Low Level of Volcanic Unrest“ (on a 0–5 level scale).
Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
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Current Alerts:
Observatory alert level: „1 – Low Level of Volcanic Unrest“ (on a 0–5 level scale)

Karangetang (Siau Island, Sangihe Islands, Indonesia): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that unrest continued at Karangetang on 18 December 2025 (local). The alert level remained at „Level 2 – Alert“ (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: „Level 2 – Alert“ (on a 4-level scale)

Raung (East Java): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Raung on 18 December 2025 (local). The alert level remained at „Level 2 – Alert“ (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: „Level 2 – Alert“ (on a 4-level scale)

Ibu (Halmahera, Indonesia): Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: VA LAST REPORTED AT 19/1337Z MOV NE EST VA DTG:19/1600Z
…19 Dec:
The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Ibu on 18 December 2025 (local). Ash and gas plume(s) rose to a maximum of 700 m (2,297 ft) above the vent. There were 112 seismically detected explosions reported. The alert level remained at „Level 2 – Alert“ (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: „Level 2 – Alert“ (on a 4-level scale)

Talang (Sumatra): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that unrest continued at Talang on 18 December 2025 (local). The alert level remained at „Level 2 – Alert“ (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: „Level 2 – Alert“ (on a 4-level scale)

Lewotobi (Flores): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Lewotobi (Laki-Laki) on 18 December 2025 (local). The alert level remained at „Level 3 – Standby“ (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: „Level 3 – Standby“ (on a 4-level scale)

Soputan (North Sulawesi, Indonesia): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that unrest continued at Soputan on 18 December 2025 (local). The alert level remained at „Level 2 – Alert“ (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: „Level 2 – Alert“ (on a 4-level scale)

Lewotolo (Lesser Sunda Islands): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Lewotolok on 18 December 2025 (local). Gas and vapor plume(s) rose to a maximum of 50 m (164 ft) above the vent. The alert level remained at „Level 2 – Alert“ (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: „Level 2 – Alert“ (on a 4-level scale)

Merapi (Central Java, Indonesia): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Merapi on 18 December 2025 (local). Gas and vapor plume(s) rose to a maximum of 25 m (82 ft) above the vent. There were 3 hot rockfalls, traveling up to 1,500 m. There were 89 seismically detected rockfalls. The alert level remained at „Level 3 – Standby“ (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: „Level 3 – Standby“ (on a 4-level scale)

Bromo (East Java, Indonesia): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that unrest continued at Tengger Caldera on 18 December 2025 (local). The alert level remained at „Level 2 – Alert“ (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: „Level 2 – Alert“ (on a 4-level scale)

Semeru (East Java, Indonesia): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Semeru on 18 December 2025 (local). Ash and gas plume(s) rose to a maximum of 800 m (2,625 ft) above the vent. There were 161 seismically detected explosions reported. There were 6 seismically detected rockfalls. The alert level remained at „Level 3 – Standby“ (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: „Level 3 – Standby“ (on a 4-level scale)

Marapi (Western Sumatra, Indonesia): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Marapi on 18 December 2025 (local). The alert level remained at „Level 2 – Alert“ (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: „Level 2 – Alert“ (on a 4-level scale)

Dukono (Halmahera): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Dukono on 18 December 2025 (local). Ash and gas plume(s) rose to a maximum of 600 m (1,969 ft) above the vent. The alert level remained at „Level 2 – Alert“ (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: „Level 2 – Alert“ (on a 4-level scale)

Awu (Sulawesi & Sangihe Islands): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that unrest continued at Awu on 18 December 2025 (local). The alert level remained at „Level 2 – Alert“ (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: „Level 2 – Alert“ (on a 4-level scale)

Kerinci (Sumatra): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that unrest continued at Kerinci on 18 December 2025 (local). The alert level remained at „Level 2 – Alert“ (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: „Level 2 – Alert“ (on a 4-level scale)

Lokon-Empung (North Sulawesi, Indonesia): The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that unrest continued at Lokon-Empung on 18 December 2025 (local). The alert level remained at „Level 2 – Alert“ (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)
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Current Alerts:
Observatory alert level: „Level 2 – Alert“ (on a 4-level scale)

Kilauea (Hawai’i): The United States Geological Survey – Hawaiian Volcano Observatory (USGS-HVO) reported that the eruption continued at Kilauea on 18 December 2025 (local). The alert level remained at „Watch“ (level 3 on a 4-level scale). The aviation alert level remained at „Orange“ (level 3 on a 4-level scale).
Source: United States Geological Survey – Hawaiian Volcano Observatory (USGS-HVO)
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Current Alerts:
Observatory alert level: „Watch“ (level 3 on a 4-level scale)

Shishaldin (Aleutian Islands, Alaska): The United States Geological Survey – Alaska Volcano Observatory (USGS-AVO) reported that unrest continued at Shishaldin between 17 December 2025 (local) and 18 December 2025 (local). The alert level remained at „Advisory“ (level 2 on a 4-level scale). The aviation alert level remained at „Yellow“ (level 2 on a 4-level scale).
Source: United States Geological Survey – Alaska Volcano Observatory (USGS-AVO)
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Current Alerts:
Observatory alert level: „Advisory“ (level 2 on a 4-level scale)

Great Sitkin (United States, Aleutian Islands): The United States Geological Survey – Alaska Volcano Observatory (USGS-AVO) reported that the eruption continued at Great Sitkin between 17 December 2025 (local) and 18 December 2025 (local). The alert level remained at „Watch“ (level 3 on a 4-level scale). The aviation alert level remained at „Orange“ (level 3 on a 4-level scale).
Source: United States Geological Survey – Alaska Volcano Observatory (USGS-AVO)
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Current Alerts:
Observatory alert level: „Watch“ (level 3 on a 4-level scale)

Popocatépetl (Central Mexico): The Centro Nacional de Prevención de Desastres (CENAPRED) reported that the eruption continued at Popocatépetl between 17 December 2025 (local) and 18 December 2025 (local). The alert level remained at „Yellow Alert – Phase 2“ (level 4 on a 7-level scale).
Source: Centro Nacional de Prevención de Desastres (CENAPRED)
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Current Alerts:
Observatory alert level: „Yellow Alert – Phase 2“ (level 4 on a 7-level scale)

Fuego (Guatemala): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 16000 ft (4900 m) altitude or flight level 160 .
The full report is as follows: ONGOING VA EMS to 16000 ft (4900 m)

Turrialba (Costa Rica): The Observatorio Vulcanológico y Sismológico de Costa Rica – Universidad Nacional (OVSICORI-UNA) reported that unrest continued at Turrialba on 18 December 2025 (local). The alert level remained at „Level 2 – Warning“ (on a 0–4 level scale).
Source: Observatorio Vulcanológico y Sismológico de Costa Rica – Universidad Nacional (OVSICORI-UNA)
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Current Alerts:
Observatory alert level: „Level 2 – Warning“ (on a 0–4 level scale)

Rincón de la Vieja (Costa Rica): The Observatorio Vulcanológico y Sismológico de Costa Rica – Universidad Nacional (OVSICORI-UNA) reported that unrest continued at Rincón de la Vieja on 18 December 2025 (local). The alert level remained at „Level 2 – Warning“ (on a 0–4 level scale). The aviation alert level remained at „Yellow“ (level 2 on a 4-level scale).
Source: Observatorio Vulcanológico y Sismológico de Costa Rica – Universidad Nacional (OVSICORI-UNA)
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Current Alerts:
Observatory alert level: „Level 2 – Warning“ (on a 0–4 level scale)

Poas (Costa Rica): The Observatorio Vulcanológico y Sismológico de Costa Rica – Universidad Nacional (OVSICORI-UNA) reported that the eruption continued at Poás on 18 December 2025 (local). The alert level remained at „Level 2 – Warning“ (on a 0–4 level scale). The aviation alert level remained at „Yellow“ (level 2 on a 4-level scale).
Source: Observatorio Vulcanológico y Sismológico de Costa Rica – Universidad Nacional (OVSICORI-UNA)
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Current Alerts:
Observatory alert level: „Level 2 – Warning“ (on a 0–4 level scale)

Puracé (Colombia): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 19000 ft (5800 m) altitude or flight level 190 .
The full report is as follows: OCNL VA EMS to 19000 ft (5800 m)
…19 Dec:
The Servicio Geológico Colombiano (SGC) reported that the eruption continued at Puracé on 18 December 2025 (local). The alert level remained at „Orange“ (level 3 on a 4-level scale).
Source: Servicio Geológico Colombiano (SGC)
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Current Alerts:
Observatory alert level: „Orange“ (level 3 on a 4-level scale)

Sangay (Ecuador): The Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN) reported that the eruption continued at Sangay between 17 December 2025 (local) and 18 December 2025 (local). The alert level remained at „2 – Yellow“ (on a 4-level scale).
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
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Current Alerts:
Observatory alert level: „2 – Yellow“ (on a 4-level scale)

Reventador (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 .
The full report is as follows: FREQUENT VA EMS to 15000 ft (4600 m)
…19 Dec:
The Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN) reported that the eruption continued at Reventador between 17 December 2025 (local) and 18 December 2025 (local). The alert level remained at „3 – Orange“ (on a 4-level scale).
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
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Current Alerts:
Observatory alert level: „3 – Orange“ (on a 4-level scale)

Sabancaya (Peru): The Centro Vulcanológico Nacional del Instituto Geofísico del Perú (CENVUL-IGP) reported that the eruption continued at Sabancaya between 17 December 2025 (local) and 18 December 2025 (local). The alert level remained at „Orange“ (level 3 on a 4-level scale).
Source: Centro Vulcanológico Nacional del Instituto Geofísico del Perú (CENVUL-IGP)
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Current Alerts:
Observatory alert level: „Orange“ (level 3 on a 4-level scale)

Volcano Activity Summary for 19 Dec 2025: