Vulkan-Monitor

Augenblicklich aktive Vulkane:

Akan (Japan) - Report for 10 September-16 September 2025 - NEW

Datum: Wed, 17 Sep 2025 03:48:44 -0400

Beschreibung:

The Japan Meteorological Agency (JMA) reported increasing unrest at Me-Akan (also known as Meakan-dake, which means Meakan Peak) of the Akan volcanic complex during 11-15 September. The number of small-amplitude volcanic earthquakes with epicenters near Ponmachineshiri Crater began to increase at around 1500 on 11 September and remained elevated during the week with daily counts of 19-50 events. A large tilt change in the direction of the crater was detected at 1440 on 12 September, followed by a period of volcanic tremor during approximately 1440-1447. Tilt continued at a lower rate through 15 September. At around 1800 on 12 September, the typical white steam-and-gas plumes at 96-1 Crater within Ponmachineshiri became more voluminous and taller, rising to 100 m above the crater rim and drifting N, NE, and E. The plumes remained voluminous on 12, 13, and 15 September; weather conditions obscured views on 14 September. Increased thermal activity at the crater was confirmed based on field observations on 15 September. At 1520 on 15 September the Alert Level was raised to 2 (the second lowest level on a 5-level scale) and the public was warned to exercise caution within 500 m of Ponmachineshiri Crater. During an overflight on 16 September scientists confirmed that the vigorous steam-and-gas plumes were rising 200 m above 96-1 Crater and there were proximal ash deposits, mainly to the N. No significant changes were detected in the ground surface temperatures around 96-1 Crater.

Source: Japan Meteorological Agency (JMA)

Kanlaon (Philippines) - Report for 10 September-16 September 2025 - NEW

Datum: Wed, 17 Sep 2025 03:48:44 -0400

Beschreibung:

The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported continuing unrest and an ash emission at Kanlaon during 9-16 September. Daily gas-and-steam emissions of variable densities rose 300-900 m above the crater rim and drifted E, NW, W, and SW. Daily sulfur dioxide emissions ranged from 1,031 to 2,338 tonnes per day (t/d); the average was 2,594 t/d in 2025. A 20-minute-long ash emission began at 0510 on 10 September and produced ash plumes that rose 600 m and drifted WSW. A total of 41 volcano-tectonic (VT) earthquakes were detected from 2200 on 13 September to 1000 on 14 September that were located at depths of 0-7 km beneath the NW flank. The strongest events were classified at Intensity III and felt in La Carlota City (14 km W), Bacolod City (35 km NW), and Canlaon City (10 km ESE), Negros Oriental, as well as in Bago City (30 km NW), Murcia (17 km NNW), and La Castellana (16 km SW), Negros Occidental. During 0000-0800 on 15 September the seismic network recorded 72 VT earthquakes located at depths of 0-12 km. The events were 0.8-3.6 local magnitudes. The strongest events were classified at Intensity I and felt in La Carlota City and Canlaon City. The Alert Level remained at 2 (on a scale of 0-5); the public was warned to stay out of the 4-km-radius Permanent Danger Zone (PDZ) and pilots were advised to avoid flying close to the summit.

Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)

Lokon-Empung (Indonesia) - Report for 10 September-16 September 2025 - NEW

Datum: Wed, 17 Sep 2025 03:48:44 -0400

Beschreibung:

The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported continuing unrest at Lokon-Empung during 10-16 September. Seismicity continued to be elevated. Daily white steam-and-gas plumes rose as high as 150 m above the Tompaluan Crater rim and drifted in multiple directions. Incandescence at the crater was visible in a few nighttime webcam images. The Alert Level remained at 3 (on a scale of 1-4) and the public was warned to stay 2.5 km away from Tompaluan Crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

Sabancaya (Peru) - Report for 10 September-16 September 2025 - NEW

Datum: Wed, 17 Sep 2025 03:48:44 -0400

Beschreibung:

The Instituto Geofísico del Perú?s (IGP) Centro Vulcanológico Nacional (CENVUL) reported that at 1625 on 13 September an explosion at Sabancaya generated an ash plume that rose 5 km above the crater rim and drifted at least 20 km W, S, and SE. Pyroclastic flows descended the NW, N, and NE flanks as far as 1.6 km. Sulfur dioxide emissions were at low levels, averaging 218 tons per day, and no thermal anomalies were identified. The Alert Level was raised to Orange (the second highest level on a four-color scale) on 13 September and the public was warned to stay outside of a 12 km radius from the summit.

Source: Instituto Geofísico del Perú (IGP)

Taal (Philippines) - Report for 10 September-16 September 2025 - NEW

Datum: Wed, 17 Sep 2025 03:48:44 -0400

Beschreibung:

The Philippine Institute of Volcanology and Seismology (PHIVOLCS) reported eruptive activity at Taal during 9-16 September. The seismic network recorded 1-9 daily periods of volcanic tremor ranging from two minutes up to almost 29 hours. There were 5-10 daily volcanic earthquakes that included the volcanic tremor signals during 9-13 September, though no volcanic earthquakes were recorded on 14 September. Daily gas-and-steam emissions with variable densities rose 600-1,200 m above the crater rim and drifted SW. Sulfur dioxide emissions averaged 1,749 tonnes per day (t/d) on 9 September and 1,456 t/d on 11 September. One minor phreatic event occurred on 11 September and lasted for two minutes. Volcano Island (TVI) was a Permanent Danger Zone (PDZ) and recommended that the Main Crater and areas along the Daang Kastila fissure should remain prohibited. Pilots were warned to avoid flying over TVI.

Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)