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What was erupting in the year...?

There were 53 confirmed eruptions at some point during 2021 from 52 different volcanoes; 7 of those were new eruptions that started during the year. A stop date with "(continuing)" indicates that the eruption was considered to be ongoing as of the date indicated. Data is reported through the last data update (6 May 2021). Information about more recent eruptions can be found in the Smithsonian / USGS Weekly Volcanic Activity Report.

Volcano Country Eruption Start Date Eruption Stop Date Max VEI
Dieng Volcanic Complex Indonesia 2021 Apr 29 2021 Apr 29
Piton de la Fournaise France 2021 Apr 9 2021 May 6 (continuing)
Karymsky Russia 2021 Apr 3 2021 May 6 (continuing)
Krysuvik-Trolladyngja Iceland 2021 Mar 19 2021 May 6 (continuing)
Veniaminof United States 2021 Feb 28 2021 Apr 5
Semisopochnoi United States 2021 Feb 2 ± 2 days 2021 May 6 (continuing)
Raung Indonesia 2021 Jan 21 2021 May 6 (continuing)
Merapi Indonesia 2020 Dec 31 2021 May 6 (continuing) 1
Soufriere St. Vincent Saint Vincent and the Grenadines 2020 Dec 27 2021 May 6 (continuing) 4
San Cristobal Nicaragua 2020 Dec 27 (?) 2021 Mar 19 3
Kilauea United States 2020 Dec 20 2021 May 6 (continuing) 0
Lewotolok Indonesia 2020 Nov 27 2021 May 6 (continuing) 2
Kavachi Solomon Islands 2020 Sep 2 2021 Apr 10 (continuing) 0
Sinabung Indonesia 2020 Aug 8 2021 May 6 (continuing) 3
Karymsky Russia 2020 Apr 1 2021 Feb 5 3
Sarychev Peak Russia 2020 Feb 29 ± 1 days 2021 May 5 (continuing) 1
Klyuchevskoy Russia 2019 Apr 9 2021 Mar 20 2
Sangay Ecuador 2019 Mar 26 2021 May 6 (continuing) 2
Tinakula Solomon Islands 2018 Dec 8 (in or before) 2021 Apr 26 (continuing) 2
Karangetang Indonesia 2018 Nov 25 2021 Apr 23 (continuing) 2
Barren Island India 2018 Sep 25 2021 May 4 (continuing) 1
Nyamulagira DR Congo 2018 Apr 18 2021 May 6 (continuing) 0
Kadovar Papua New Guinea 2018 Jan 5 2021 May 6 (continuing) 2
Ol Doinyo Lengai Tanzania 2017 Apr 9 2021 May 6 (continuing) 0
Aira Japan 2017 Mar 25 2021 May 6 (continuing) 1
Sabancaya Peru 2016 Nov 6 2021 May 6 (continuing) 3
Ebeko Russia 2016 Oct 20 2021 May 6 (continuing) 2
Nevados de Chillan Chile 2016 Jan 8 2021 May 6 (continuing) 2
Langila Papua New Guinea 2015 Oct 22 (?) 2021 May 6 (continuing) 2
Masaya Nicaragua 2015 Oct 3 2021 Apr 28 (continuing) 1
Tofua Tonga 2015 Oct 2 2021 Apr 22 (continuing) 0
Pacaya Guatemala 2015 Jun 7 ± 1 days 2021 May 6 (continuing) 1
Villarrica Chile 2014 Dec 2 ± 7 days 2021 May 5 (continuing) 1
Nevado del Ruiz Colombia 2014 Nov 18 2021 May 6 (continuing) 2
Saunders United Kingdom 2014 Nov 12 2021 Apr 20 (continuing) 1
Manam Papua New Guinea 2014 Jun 29 2021 May 4 (continuing) 2
Semeru Indonesia 2014 Apr 1 ± 15 days 2021 May 6 (continuing) 3
Etna Italy 2013 Sep 3 2021 May 6 (continuing) 2
Heard Australia 2012 Sep 5 ± 4 days 2021 Jan 20 0
Bezymianny Russia 2010 May 21 (?) 2021 Mar 8 (continuing) 3
Reventador Ecuador 2008 Jul 27 2021 May 6 (continuing) 2
Ibu Indonesia 2008 Apr 5 2021 May 6 (continuing) 1
Popocatepetl Mexico 2005 Jan 9 2021 May 6 (continuing) 2
Suwanosejima Japan 2004 Oct 23 2021 May 6 (continuing) 2
Nyiragongo DR Congo 2002 May 17 (?) 2021 May 6 (continuing) 2
Fuego Guatemala 2002 Jan 4 2021 May 6 (continuing) 3
Bagana Papua New Guinea 2000 Feb 28 (in or before) 2021 May 6 (continuing) 2
Sheveluch Russia 1999 Aug 15 2021 May 6 (continuing) 4
Erebus Antarctica 1972 Dec 16 (in or before) ± 15 days 2021 May 6 (continuing) 2
Stromboli Italy 1934 Feb 2 2021 May 6 (continuing) 2
Dukono Indonesia 1933 Aug 13 2021 May 6 (continuing) 3
Santa Maria Guatemala 1922 Jun 22 2021 May 6 (continuing) 3
Yasur Vanuatu 1774 Jul 2 (in or before) ± 182 days 2021 May 6 (continuing) 3

List of Questions

Global Volcanism Program, 2013. Volcanoes of the World, v. 4.10.0 (14 May 2021). Venzke, E (ed.). Smithsonian Institution. Downloaded 15 Jun 2021. https://doi.org/10.5479/si.GVP.VOTW4-2013.