Volcanos

Roundup of Global Volcanic Activity – New Activity for the Week 12 May 2021 – 18 May 2021

Great Sitkin – Andreanof Islands (USA) : AVO reported that elevated surface temperatures at Great Sitkin had been identified in satellite images since January and had been increasing in frequency during the previous two months. A minor increase in seismicity began to be recorded on 9 May and volcanic gas emissions increased on 10 May. AVO raised the Aviation colour Code to Yellow and the Volcano Alert Level to Advisory on 12 May.

Sheveluch – Central Kamchatka (Russia) : KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 7-14 May. A new lava block (named “Dolphin-2”) that extruded from the top of the lava dome was visible in a 15 May photo. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Stromboli – Aeolian Islands (Italy) : INGV reported a collapse event at Stromboli’s Area N (North Crater area) on 19 May. A series of explosions began at 1447, producing a pyroclastic flow that at 1451 descended the Sciara del Fuoco to the coast and traveled 1 km over the sea. The explosions and pyroclastic flow produced large, dense ash clouds that rose above both the summit area and along the entire length of the pyroclastic flow. A series of less intense pyroclastic flows began at 1502 that also reached the sea. Lava flows from Area N also descended the Sciara del Fuoco to the coast.

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