Volcanos

Roundup of Global Volcanic Activity – Ongoing Activity for the Week 25 November 2020 – 1 December 2020

Aira – Kyushu (Japan) : JMA reported that during 23-30 November incandescence from Minamidake Crater (at Aira Caldera’s Sakurajima volcano) was visible nightly. Very small eruptive events were recorded. The Alert Level remained at 3 (on a 5-level scale).

Dukono – Halmahera (Indonesia) : Based on satellite and wind model data, and information from PVMBG, the Darwin VAAC reported that during 25 and 28-30 November ash plumes from Dukono rose to 2.1 km (7,000 ft) a.s.l. and drifted E and SE. 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.

Ebeko – Paramushir Island (Russia) : Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 21-24 November that sent ash plumes up to 3 km (10,000 ft) a.s.l. and drifted NE, E, and SE. Ashfall was reported in Severo-Kurilsk during 23-24 November. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Erta Ale – Ethiopia : Satellite data periodically showed possible thermal anomalies in Erta Ale’s N pit crater during 5 September-10 October; the crater was sometimes obscured by fumes through 29 November. A weak thermal anomaly may have been present in the S pit crater during 5 September-24 November, but was notably larger on 29 November.

Ibu – Halmahera (Indonesia) : PVMBG reported that at 1818 on 27 November a gray ash plume from Ibu rose 800 m and drifted W. 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.

Klyuchevskoy – Central Kamchatka (Russia) : KVERT reported that Strombolian and Vulcanian activity at Klyuchevskoy continued during 20-27 November and lava advanced down the Apakhonchich drainage on the SE flank. A large bright thermal anomaly was identified daily in satellite images. During 20-21 and 23-26 November ash plumes drifted 186 km N, E, and SE. The Aviation colour Code remined at Orange (the second highest level on a four-colour scale).

Nishinoshima – Japan : The Japan Coast Guard reported that during an overflight of Nishinoshima on 24 August scientists observed white fumarolic plumes rising from multiple locations on the inner crater wall and the rim. The inner crater wall continued to be hot. The ocean water was brown around the W, S, and E parts of the island.

Raung – Eastern Java (Indonesia) : PVMBG reported that during 1-3 October dense gray plumes rose 50-300 m above Raung’s summit; neither eruptions nor gas emissions were visible afterwards, through 26 November. Seismicity decreased and deflation was recorded. The Alert Level was lowered to 1 (on a scale of 1-4) on 27 November, and the public was warned to stay away from the summer crater.

Sheveluch – Central Kamchatka (Russia) : KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 20-27 November. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Sinabung – Indonesia : PVMBG reported that white-and-gray ash plumes rose as high as 500 m above Sinabung’s summit daily during 25 November-1 December. Block avalanches traveled 1 km down the flank on 1 December. The Alert Level remained at 3 (on a scale of 1-4), with a general exclusion zone of 3 km and extensions to 5 km in the SE sector and 4 km in the NE sector.

Suwanosejima – Ryukyu Islands (Japan) : JMA reported nighttime incandescence and intermittent eruptive activity at Suwanosejima’s Ontake Crater during 20-27 November. A total of 34 explosions were recorded, ejecting bombs up to 700 m away from the crater and producing gray-and-white plumes that rose 1.4 km above the crater rim. The Tokyo VAAC noted that ash plumes drifted S and SE. Ashfall was reported in Toshima village (4 km SSW). Crater incandescence was visible from the morning of 20 November through 22 November. The Alert Level remained at 2 (on a 5-level scale).

Telica – Nicaragua : INETER reported that ash-and-gas plumes rose from Telica on 30 November and drifted NE. Social media posts noted that around 50 ash-and-gas plumes rose 100-400 m above the crater rim during 30 November-1 December. Ash fell in Los Cocos (9 km SSW), El Panal (9 km SSW), Verónica Lacayo (10 km SW), Nuevo Belén, and pictures showed vegetation and buildings coated in ash.

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