Vulkan-Monitor

Augenblicklich aktive Vulkane:

Ambae (Vanuatu) - Report for 24 December-30 December 2025 - NEW

Datum: Tue, 30 Dec 2025 01:52:32 -0400

Beschreibung:

The Vanuatu Meteorology and Geohazards Department (VMGD) reported ongoing unrest at Ambae during December based on seismic and satellite data and webcam images. Sulfur dioxide emissions at variable rates were identified in satellite images during 1-23 December. A low-level thermal anomaly was also detected in satellite images during 3, 5-7, 10-12, and 25 December. Low- to moderate-intensity thermal anomalies were also detected in satellite images during 2-3, 7-9, and 12 December. Steam and/or gas and/or ash emissions were visible in satellite and webcam observations during 7-9 and 11-12 December. Seismic activity was characterized by volcanic tremor and several volcano-seismic events. The Alert Level remained at 2 (on a scale of 0-5), and the public was warned to stay outside of Danger Zone A, defined as a 2-km radius around the active vents in Lake Voui, and to stay away from drainages during heavy rains.

Source: Vanuatu Meteorology and Geohazards Department (VMGD)

Barren Island (India) - Report for 24 December-30 December 2025 - NEW

Datum: Tue, 30 Dec 2025 01:52:32 -0400

Beschreibung:

Satellite images of Barren Island acquired on 20, 22, and 25 December showed thermal anomalies over parts of the lower half of the N-flank flows, suggesting that they were hot and active. A thermal anomaly over one vent at the summit was also identified in the images, though weather clouds obscured the summit area on 20 December. The Darwin Volcanic Ash Advisory Centre (VAAC) reported that on 25 December an ash plume was identified in satellite images rising 1.2 km (4,000 ft) a.s.l. and drifting SW.

Sources: Copernicus,Darwin Volcanic Ash Advisory Centre (VAAC)

Etna (Italy) - Report for 24 December-30 December 2025 - NEW

Datum: Tue, 30 Dec 2025 01:52:32 -0400

Beschreibung:

The Sezione di Catania - Osservatorio Etneo (INGV) reported that eruptive activity at Etna?s summit craters significantly intensified on 24 December. Activity within NE Crater (Northeast Crater), which had been occurring for several weeks, significantly intensified on 24 December. Though weather clouds partially obscured views of the summit, a webcam view showed incandescent material being ejected above the crater rim at around 1910. A dense steam plume drifted ENE. Eruptive events detected in infrasonic data were frequent, with increasing amplitudes, and originated both from NE Crater and to a lesser extent from Bocca Nuova Crater (BN). Tremor detected in infrasonic data began at around 2250. Strombolian activity at the BN-2 vent in BN Crater became more frequent and intense overnight during 25-26 December and ejected incandescent material 100 m above the crater rim. Incandescence within NE Crater intensified and during the morning Strombolian activity ejected material that occasionally fell onto the flanks. A gas, steam, and ash plume drifted NE, causing minor ashfall in Piano Provenzana (6 km NE) and Taormina (28 ENE). Weather conditions worsened through the day on 26 December and by sunset and through the night only intense reddish glow through the clouds was observed. Activity again intensified and continuous roars were heard at locations along the flanks. Visibility gradually improved during the early hours of 27 December. Ash-and-steam plumes rose from a vent on the E flank of the Voragine Crater at 0700 based on webcam views. The vent produced a lava flow that descended towards the Valle del Bove. The activity rapidly intensified at NE Crater at around 1000; lava fountains rose 150-200 m and ash emissions were continuous. Activity at NE Crater decreased by 1050 and ash emissions became sporadic. Plumes mostly consisting of white steam rose several kilometers high from the summit area. After a few hours of lower-level activity lava fountaining began at NE Crater at around 1515. Fountains rose 300-400 m and a plume containing tephra rose several kilometers and drifted W. By 1545 lava fountaining transitioned to strong explosions and bursting lava bubbles, ejecting coarse pyroclastic material that landed around the base of the cone and beyond. Ash emissions were intermittent. Around the same time moderate explosive activity continued from the vent on the E flank of Voragine, producing continuous ash plumes that rose a few hundred meters high. Visibility improved later that evening, and the entire summit was visible. Beginning at 1948 a series of strong explosions at NE Crater ejected coarse pyroclastic material across the entire cone and well beyond its base. Activity at Voragine Crater?s flank vent intensified and by 2046 was producing a constant lava fountain that rose several dozen meters high. The lava flow had traveled almost 2 km. Overnight during 27-28 December activity at the vent continued with frequent ash emissions drifting W and jets of pyroclastic material rising up to 100 m above the vent. The NE Crater produced sporadic explosions overnight and some ash puffs early on 28 December. The lava flow was flowing at dawn but appeared to have stopped by 2122 on 28 December, with only a few incandescent areas visible.

Source: Sezione di Catania - Osservatorio Etneo (INGV)

Home Reef (Tonga) - Report for 24 December-30 December 2025 - NEW

Datum: Tue, 30 Dec 2025 01:52:32 -0400

Beschreibung:

Satellite images of Home Reef showed that between 22-27 December lobes of lava advanced in multiple directions from a crater the center of the island. Flows to the E and SE each continued to enter the ocean and extended the coastline. Additional flows to the NW entered the ocean and extended the coastline by about 100 m. Near infrared data on 22 and 27 December showed thermal anomalies over the summit and brighter areas over multiple lava flows in all sectors, with minor activity on the SW flank.

Source: Copernicus

Kikai (Japan) - Report for 24 December-30 December 2025 - NEW

Datum: Tue, 30 Dec 2025 01:52:32 -0400

Beschreibung:

The Japan Meteorological Agency (JMA) reported that an eruption at Iodake Crater located at Satsuma Iwo-jima, a subaerial part of Kikai?s NW caldera rim, was recorded at 0207 on 29 December, the first since 3 September 2024. An eruption plume rose 200 m above the crater rim and drifted SW. The report noted that there were few volcanic earthquakes, and no notable changes detected before or after the eruption. No volcanic tremors were recorded. The Alert Level remained at 2 (on a 5-level scale), and residents were warned to be cautious within 500 m away from Iodake Crater.

Source: Japan Meteorological Agency (JMA)