Dukono (Indonesia)

GVP-report for 30 September-6 October 2020

Based on satellite and wind model data, and information from PVMBG, the Darwin VAAC reported that during 30 September-6 October ash plumes from Dukono rose 1.8-2.4 km a.s.l. and drifted in different directions. The Alert Level remained at 2, and the public was warned to remain outside of the 2-km exclusion zone.

Sources: Darwin Volcanic Ash Advisory Centre, PVMBG

Klyuchevskoy (Russia)

GVP-report for 30 September-6 October 2020

Strombolian activity at Klyuchevskoy began at 1003 on 2 October prompting KVERT to raise the Aviation Color Code to Yellow. Explosions ejected ash 300-400 m above the volcano and produced gas-and-steam plumes with some ash that drifted down the E flank.

Source: Kamchatkan Volcanic Eruption Response Team

Grimsvotn (Iceland)

The Icelandic Meteorological Office raised the Aviation Color Code for Grímsvötn to Yellow on 30 September, noting that activity had been increasing over time and was above background levels. The report stated that seismicity increased over the past month, cauldrons had deepened in several places around the caldera signifying increased geothermal activity, surface deformation surpassed the level prior to the 2011 eruption, and magmatic gases were present in emissions over the summer. Additionally, water levels in the subglacial lake were comparable to levels prior to floods in 2004 and 2010.

Source: Icelandic Meteorological Office (IMO)

GVP

Sakurajima (Japan)

JMA reported that very small eruptive events at Minamidake Crater were recorded during 14-21 September. Crater incandescence was visible at night. The daily sulfur dioxide emission rate was high at 2,000 tons per day on 25 September. The Alert Level remained at 3 (on a 5-level scale).

Source: Japan Meteorological Agency (JMA)

Sangay (Ecuador)

IG issued a report with additional information about the large explosive event at Sangay on 20 September. The event began at 0440 and ended at 0610 and produced an ash plume that rose 15 km a.s.l., or about 9.7 km above the summit. The lower part of the plume was the most ash-rich and drifted W, causing significant ashfall in areas W. The gas-rich higher part of the plume drifted E. Parts of the plume also drifted S. Researchers visited several sites to measure ashfall and collect samples, allowing them to estimate the volume of the deposits at 1.5-3.4 million cubic meters, signifying a VEI 2 event.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)

Copahue (Chile-Argentina)

SERNAGEOMIN reported continuing activity at Copahue. Webcams recorded gas-and-ash plumes rising as high as 1.1 km, sometimes associated with nighttime crater incandescence. The plumes drifted 6-15 km SW and SE. Sulfur dioxide emissions were high, averaging 1,499 tonnes per day, with a high value of 3,435 on 12 September. Two thermal anomalies were identified in satellite images. The Alert Level was remained at Yellow. ONEMI maintained the Yellow Alert (the middle level on a three-color scale) for residents of the Alto Biobío municipality and access to an area within 1 km of El Agrio Crater was restricted to the public.

Sources: Oficina Nacional de Emergencia-Ministerio del Interior (ONEMI) ,Servicio Nacional de Geología y Minería (SERNAGEOMIN)

Ebeko (Russia)

Volcanologists on Paramushir Island observed explosions during 20-23 September. Ash plumes rose up to 3.5 km a.s.l. and drifted SE, E, and NE. A thermal anomaly over the volcano was visible in satellite data on 21 and 22 September. The Aviation Color Code remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Dukono (Indonesia)

The Darwin VAAC reported that during 23-28 September ash plumes from Dukono rose 2.1 km a.s.l. and drifted W and WNW. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone.

Sources: Darwin Volcanic Ash Advisory Centre (VAAC),Pusat Vulkanologi dan Mitigasi Bencana Geologi

Laguna del Maule (Chile)

SERNAGEOMIN reported that during 1-15 September inflation continued to be detected at the Laguna del Maule Volcanic Complex, although at a lower rate of 0.7 cm per month which is below the 2 cm per month average for this year. Seismicity in the S sector was low in both number and magnitude of events. The Alert Level remained at Yellow, the second lowest color on a four-color scale, as activity remained above baselines. ONEMI recommended restricted access within a radius of 2 km from the emission center.

Sources: Oficina Nacional de Emergencia-Ministerio del Interior (ONEMI) ,Servicio Nacional de Geología y Minería.

Ibu (Indonesia)

PVMBG reported that at 0554 on 26 September a white-to-gray ash plume from Ibu rose 600 m and drifted S. At 0641 on 27 September and at 0554 on 28 September ash plumes rose 500 m and drifted N. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi