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What was erupting in the year...?

There were 49 confirmed eruptions at some point during 2021 from 49 different volcanoes; 4 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 (12 March 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
Veniaminof United States 2021 Feb 28 2021 Mar 12 (continuing)
Semisopochnoi United States 2021 Feb 2 ± 2 days 2021 Feb 7
Raung Indonesia 2021 Jan 21 2021 Mar 12 (continuing)
Sarychev Peak Russia 2021 Jan 7 2021 Feb 19
Merapi Indonesia 2020 Dec 31 2021 Mar 12 (continuing)
San Cristobal Nicaragua 2020 Dec 27 (?) 2021 Mar 9
Soufriere St. Vincent Saint Vincent and the Grenadines 2020 Dec 27 2021 Mar 12 (continuing)
Kilauea United States 2020 Dec 20 2021 Mar 12 (continuing) 0
Lewotolok Indonesia 2020 Nov 27 2021 Mar 12 (continuing)
Kavachi Solomon Islands 2020 Sep 2 2021 Mar 11 (continuing)
Sinabung Indonesia 2020 Aug 8 2021 Mar 12 (continuing)
Karymsky Russia 2020 Apr 1 2021 Feb 5
Klyuchevskoy Russia 2019 Apr 9 2021 Mar 12 (continuing) 2
Sangay Ecuador 2019 Mar 26 2021 Mar 12 (continuing) 2
Tinakula Solomon Islands 2018 Dec 8 (in or before) 2021 Mar 12 (continuing) 2
Karangetang Indonesia 2018 Nov 25 2021 Mar 12 (continuing) 2
Barren Island India 2018 Sep 25 2021 Mar 6 (continuing) 1
Nyamulagira DR Congo 2018 Apr 18 2021 Mar 12 (continuing) 0
Kadovar Papua New Guinea 2018 Jan 5 2021 Mar 10 (continuing) 2
Ol Doinyo Lengai Tanzania 2017 Apr 9 2021 Mar 12 (continuing) 0
Aira Japan 2017 Mar 25 2021 Mar 12 (continuing) 1
Sabancaya Peru 2016 Nov 6 2021 Mar 12 (continuing) 3
Ebeko Russia 2016 Oct 20 2021 Mar 12 (continuing) 2
Nevados de Chillan Chile 2016 Jan 8 2021 Mar 12 (continuing) 2
Langila Papua New Guinea 2015 Oct 22 (?) 2021 Mar 9 (continuing) 2
Masaya Nicaragua 2015 Oct 3 2021 Mar 12 (continuing) 1
Tofua Tonga 2015 Oct 2 2021 Mar 12 (continuing) 0
Pacaya Guatemala 2015 Jun 7 ± 1 days 2021 Mar 12 (continuing) 1
Villarrica Chile 2014 Dec 2 ± 7 days 2021 Mar 12 (continuing) 1
Nevado del Ruiz Colombia 2014 Nov 18 2021 Mar 12 (continuing) 2
Saunders United Kingdom 2014 Nov 12 2021 Feb 19 (continuing) 1
Manam Papua New Guinea 2014 Jun 29 2021 Mar 12 (continuing) 2
Semeru Indonesia 2014 Apr 1 ± 15 days 2021 Mar 12 (continuing) 3
Etna Italy 2013 Sep 3 2021 Mar 12 (continuing) 2
Heard Australia 2012 Sep 5 ± 4 days 2021 Jan 20 (continuing) 0
Bezymianny Russia 2010 May 21 (?) 2021 Mar 8 (continuing) 3
Reventador Ecuador 2008 Jul 27 2021 Feb 15 (continuing) 2
Ibu Indonesia 2008 Apr 5 2021 Mar 12 (continuing) 1
Popocatepetl Mexico 2005 Jan 9 2021 Mar 12 (continuing) 2
Suwanosejima Japan 2004 Oct 23 2021 Mar 12 (continuing) 2
Nyiragongo DR Congo 2002 May 17 (?) 2021 Mar 12 (continuing) 2
Fuego Guatemala 2002 Jan 4 2021 Mar 12 (continuing) 3
Bagana Papua New Guinea 2000 Feb 28 (in or before) 2021 Mar 12 (continuing) 2
Sheveluch Russia 1999 Aug 15 2021 Mar 12 (continuing) 4
Erebus Antarctica 1972 Dec 16 (in or before) ± 15 days 2021 Mar 12 (continuing) 2
Stromboli Italy 1934 Feb 2 2021 Mar 12 (continuing) 2
Dukono Indonesia 1933 Aug 13 2021 Mar 12 (continuing) 3
Santa Maria Guatemala 1922 Jun 22 2021 Mar 12 (continuing) 3
Yasur Vanuatu 1774 Jul 2 (in or before) ± 182 days 2021 Mar 12 (continuing) 3

List of Questions

Global Volcanism Program, 2013. Volcanoes of the World, v. 4.9.4 (17 Mar 2021). Venzke, E (ed.). Smithsonian Institution. Downloaded 11 Apr 2021. https://doi.org/10.5479/si.GVP.VOTW4-2013.