Volcanic activity worldwide 16 Sep 2025: Fuego volcano, Popocatépetl, Merapi, Semeru, Ibu, Dukono, …

Asama (Honshu): The Japan Meteorological Agency (JMA) reported that unrest continued at Asamayama between 12 September 2025 (local) and 15 September 2025 (local). The alert level remained at „Level 2 – Restriction on proximity to the crater“ (on a 5-level scale).
Source: Japan Meteorological Agency (JMA)
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Current Alerts:
Observatory alert level: „Level 2 – Restriction on proximity to the crater“ (on a 5-level scale)

Kirishima (Kyushu): The Japan Meteorological Agency (JMA) reported that the eruption continued at Kirishimayama between 12 September 2025 (local) and 15 September 2025 (local). The alert level remained at „Level 3 – Restriction on proximity to the volcano“ (on a 5-level scale).
Source: Japan Meteorological Agency (JMA)
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Current Alerts:
Observatory alert level: „Level 3 – Restriction on proximity to the volcano“ (on a 5-level scale)

Kikai (Ryukyu Islands): The Japan Meteorological Agency (JMA) reported that unrest continued at Kikai between 8 September 2025 (local) and 15 September 2025 (local). Gas and vapor plume(s) rose to a maximum of 400 meters (1,312 feet) above the vent. A high-sensitivity surveillance camera recorded incandescence at Iodake Crater during the night from 1–14 September. The alert level remained at „Level 2 – Restriction on proximity to the crater“ (on a 5-level scale).
Source: Japan Meteorological Agency (JMA)
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Current Alerts:
Observatory alert level: „Level 2 – Restriction on proximity to the crater“ (on a 5-level scale)

Kusatsu-Shirane (Honshu): The Japan Meteorological Agency (JMA) reported that unrest activity increased at Kusatsu-Shiranesan between 14 September 2025 (local) and 15 September 2025 (local). The alert level remained at „Level 2 – Restriction on proximity to the crater“ (on a 5-level scale).
Source: Japan Meteorological Agency (JMA)
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Current Alerts:
Observatory alert level: „Level 2 – Restriction on proximity to the crater“ (on a 5-level scale)

Sakurajima (Kyushu, Japan): The Japan Meteorological Agency (JMA) reported that the eruption continued at Aira between 12 September 2025 (local) and 15 September 2025 (local). Incandescence was observed at Minamidake Crater in overnight high-sensitivity surveillance camera images during 9–14 September. A very small eruption was recorded at the Minamidake Crater. The alert level remained at „Level 3 – Restriction on proximity to the volcano“ (on a 5-level scale).
Source: Japan Meteorological Agency (JMA)
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Current Alerts:
Observatory alert level: „Level 3 – Restriction on proximity to the volcano“ (on a 5-level scale)

Suwanose-jima (Ryukyu Islands): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTED AT 20250916/1028Z OVER FL080 STNR OBS VA DTG:16/1030Z
…16 Sep:
The Japan Meteorological Agency (JMA) reported that the eruption continued at Suwanosejima on 15 September 2025 (local). Incandescence was observed at Otake Crater in webcam images during the nighttime hours. The alert level remained at „Level 2 – Restriction on proximity to the crater“ (on a 5-level scale).
Source: Japan Meteorological Agency (JMA)
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Current Alerts:
Observatory alert level: „Level 2 – Restriction on proximity to the crater“ (on a 5-level scale)

Canlaon (Central Philippines): The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported that the eruption continued at Kanlaon on 15 September 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 unrest continued at Taal on 15 September 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 15 September 2025 (local). The alert level remained at „1 – Abnormal“ (on a 0–5 level scale).
Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
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Current Alerts:
Observatory alert level: „1 – Abnormal“ (on a 0–5 level scale)

Bulusan (Luzon Island, Philippines): The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported that unrest continued at Bulusan on 15 September 2025 (local). The alert level remained at „1 – Low Level of Volcanic Unrest“ (level 1 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“ (level 1 on a 0–5 level scale)

Ibu (Halmahera, Indonesia): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 6000 ft (1800 m) altitude or flight level 060 and is moving at 05 kts in W direction.
The full report is as follows: VA TO FL060 LAST REPORTED AT 16/1726Z EST VA DTG:16/1740Z to 6000 ft (1800 m)
…16 Sep:
The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Ibu on 15 September 2025 (local). There were 83 explosions reported, with plumes rising to a maximum of 600 meters (1,969 feet) 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)

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 15 September 2025 (local). Gas and vapor plume(s) rose to a maximum of 600 meters (1,969 feet) above the vent. The alert level remained at „Level 4 – Caution“ (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 4 – Caution“ (on a 4-level scale)

Lewotolo (Lesser Sunda Islands): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 7000 ft (2100 m) altitude or flight level 070 .
The full report is as follows: VA TO FL070 REPORTED AT 16/1633Z MOV W EST VA DTG:16/1750Z to 7000 ft (2100 m)
…16 Sep:
The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Lewotolok on 15 September 2025 (local). There were 239 explosions reported, with plumes rising to a maximum of 700 meters (2,297 feet) above the vent. 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)

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 15 September 2025 (local). Gas and vapor plume(s) rose to a maximum of 25 meters (82 feet) above the vent. There were 15 hot rockfalls, traveling up to 2,000 m. There were 70 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)

Semeru (East Java, Indonesia): Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: ERUPTION LAST REPORTED AT 16/0859Z EST VA DTG:16/1620Z
…16 Sep:
The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Semeru on 15 September 2025 (local). There were 57 explosions reported, with plumes rising to a maximum of 400 meters (1,312 feet) above the vent. There were 4 seismically detected rockfalls. 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)

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 15 September 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 15 September 2025 (local). There were 19 explosions reported, with plumes rising to a maximum of 500 meters (1,640 feet) 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)

Kilauea (Hawai’i): The United States Geological Survey – Hawaiian Volcano Observatory (USGS-HVO) reported that the eruption continued at Kilauea on 15 September 2025 (local). Moderate glow was observed at the north vent during the night. 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 14 September 2025 (local) and 15 September 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 14 September 2025 (local) and 15 September 2025 (local). Lava continued to erupt in the summit crater. 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): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 20000 ft (6100 m) altitude or flight level 200 .
The full report is as follows: VA EMS OBS to 20000 ft (6100 m)
…16 Sep:
The Centro Nacional de Prevención de Desastres (CENAPRED) reported that the eruption continued at Popocatépetl between 13 September 2025 (local) and 15 September 2025 (local). Ash and gas plume(s) were reported. 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 14000 ft (4300 m) altitude or flight level 140 .
The full report is as follows: VA EMS OBS to 14000 ft (4300 m)

Nevado del Ruiz (Colombia): (16 Sep) Volcanic Ash Advisory Center Washington (VAAC) issued the following report:

Sangay (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 21000 ft (6400 m) altitude or flight level 210 .
The full report is as follows: LGT VA EMS to 21000 ft (6400 m)
…16 Sep:
The Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN) reported that the eruption continued at Sangay between 14 September 2025 (local) and 15 September 2025 (local). There were 85 seismically detected explosions reported. 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): The Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN) reported that the eruption continued at Reventador between 14 September 2025 (local) and 15 September 2025 (local). Ash and gas plume(s) rose to a maximum of 900 meters (2,953 feet) above the vent. There were 104 seismically detected explosions reported. There were incandescent rockfalls, descending 1,000 m below the crater. 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 on 15 September 2025 (local). Gas and vapor plume(s) rose to a maximum of 500 meters (1,640 feet) above the vent. 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)