What was erupting in the year...?
There were 82 confirmed eruptions at some point during 2021 from 76 different volcanoes; 34 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 (2 May 2025). 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 |
|---|---|---|---|---|
| Piton de la Fournaise | France | 2021 Dec 22 | 2022 Jan 17 | 0 |
| Hunga Tonga-Hunga Ha'apai | Tonga | 2021 Dec 20 | 2022 Jan 15 | 5 |
| Ambae | Vanuatu | 2021 Dec 5 | 2022 Aug 15 ± 10 days | 1 |
| Pinatubo | Philippines | 2021 Nov 30 | 2021 Nov 30 | 1 |
| Iliwerung | Indonesia | 2021 Nov 28 | 2021 Nov 29 | 0 |
| Gaua | Vanuatu | 2021 Nov 16 | 2021 Nov 16 | 1 |
| Taal | Philippines | 2021 Nov 15 | 2022 Apr 1 | 2 |
| Turrialba | Costa Rica | 2021 Nov 3 | 2022 Feb 28 | 1 |
| Karangetang | Indonesia | 2021 Oct 25 | 2022 Jan 10 (?) | 2 |
| Asosan | Japan | 2021 Oct 14 | 2021 Oct 20 | 2 |
| Kilauea | United States | 2021 Sep 29 | 2023 Sep 16 | 0 |
| La Palma | Spain | 2021 Sep 19 | 2021 Dec 13 | 3 |
| Nishinoshima | Japan | 2021 Aug 14 | 2021 Aug 15 | 2 |
| Fukutoku-Oka-no-Ba | Japan | 2021 Aug 13 | 2021 Sep 12 (?) | 4 |
| Ioto | Japan | 2021 Aug 12 | 2021 Nov 24 | 1 |
| Chirinkotan | Russia | 2021 Aug 8 | 2021 Aug 26 | 2 |
| Pavlof | United States | 2021 Aug 5 | 2022 Dec 7 | 2 |
| Pagan | United States | 2021 Jul 29 | 2021 Sep 6 | 2 |
| Sirung | Indonesia | 2021 Jul 21 | 2021 Jul 21 | 1 |
| Ulawun | Papua New Guinea | 2021 Jul 9 | 2021 Nov 29 | 2 |
| Copahue | Chile-Argentina | 2021 Jul 2 | 2021 Nov 6 | 1 |
| Taal | Philippines | 2021 Jul 1 | 2021 Jul 9 | 1 |
| Rincon de la Vieja | Costa Rica | 2021 Jun 28 | 2024 Oct 22 | 2 |
| Turrialba | Costa Rica | 2021 Jun 13 | 2021 Jul 23 | 1 |
| Krakatau | Indonesia | 2021 May 25 | 2023 Dec 20 | 2 |
| Great Sitkin | United States | 2021 May 25 | 2025 May 2 (continuing) | 2 |
| Dieng Volcanic Complex | Indonesia | 2021 Apr 29 | 2021 Apr 29 | 1 |
| Telica | Nicaragua | 2021 Apr 21 | 2022 Mar 29 | 1 |
| Piton de la Fournaise | France | 2021 Apr 9 | 2021 May 24 | 0 |
| Chikurachki | Russia | 2021 Mar 21 | 2021 Aug 25 | 1 |
| Fagradalsfjall | Iceland | 2021 Mar 19 | 2021 Sep 18 | 0 |
| Veniaminof | United States | 2021 Feb 28 | 2021 Apr 5 | 1 |
| Semisopochnoi | United States | 2021 Feb 2 ± 2 days | 2023 May 5 | 2 |
| Raung | Indonesia | 2021 Jan 21 | 2021 Apr 14 | 2 |
| Merapi | Indonesia | 2020 Dec 31 | 2025 May 2 (continuing) | 1 |
| Ioto | Japan | 2020 Dec 28 | 2021 Apr 5 (?) | 1 |
| San Cristobal | Nicaragua | 2020 Dec 27 (?) | 2022 Jun 26 | 2 |
| Soufriere St. Vincent | Saint Vincent and the Grenadines | 2020 Dec 27 | 2021 Apr 22 | 4 |
| Kilauea | United States | 2020 Dec 20 | 2021 May 23 | 0 |
| Lewotolok | Indonesia | 2020 Nov 27 | 2024 Aug 20 | 2 |
| Sinabung | Indonesia | 2020 Aug 8 | 2021 Sep 23 | 3 |
| Karymsky | Russia | 2020 Apr 1 | 2022 Aug 7 | 3 |
| Sarychev Peak | Russia | 2020 Feb 29 ± 1 days | 2021 Nov 26 | 1 |
| Klyuchevskoy | Russia | 2019 Apr 9 | 2021 Mar 20 | 2 |
| Sangay | Ecuador | 2019 Mar 26 | 2025 May 2 (continuing) | 2 |
| Tinakula | Solomon Islands | 2018 Dec 8 (on or before) | 2024 Dec 31 | 2 |
| Karangetang | Indonesia | 2018 Nov 25 | 2021 Jan 30 | 2 |
| Barren Island | India | 2018 Sep 25 | 2022 Jan 30 | 1 |
| Manam | Papua New Guinea | 2018 May 10 ± 10 days | 2025 May 2 (continuing) | 4 |
| Kerinci | Indonesia | 2018 Apr 21 | 2021 Jun 13 | 1 |
| Nyamulagira | DR Congo | 2018 Apr 14 | 2025 May 2 (continuing) | 0 |
| Kadovar | Papua New Guinea | 2018 Jan 5 | 2023 May 14 | 2 |
| Semeru | Indonesia | 2017 Jun 6 | 2025 May 2 (continuing) | 4 |
| Ol Doinyo Lengai | Tanzania | 2017 Apr 9 | 2025 Apr 29 (continuing) | 0 |
| Aira | Japan | 2017 Mar 25 | 2025 May 2 (continuing) | 2 |
| Bezymianny | Russia | 2016 Dec 5 | 2021 Feb 1 ± 15 days | 3 |
| Sabancaya | Peru | 2016 Nov 6 | 2025 May 2 (continuing) | 3 |
| Ebeko | Russia | 2016 Oct 20 | 2021 Nov 9 | 2 |
| Nevados de Chillan | Chile | 2016 Jan 8 | 2022 Oct 17 | 2 |
| Langila | Papua New Guinea | 2015 Oct 22 (?) | 2025 May 2 (continuing) | 2 |
| Masaya | Nicaragua | 2015 Oct 3 | 2025 May 2 (continuing) | 1 |
| Tofua | Tonga | 2015 Oct 2 | 2025 Apr 26 (continuing) | 0 |
| Pacaya | Guatemala | 2015 Jun 7 ± 1 days | 2021 Aug 13 | 1 |
| Villarrica | Chile | 2014 Dec 2 ± 7 days | 2025 Apr 19 (continuing) | 3 |
| Nevado del Ruiz | Colombia | 2014 Nov 18 | 2025 May 2 (continuing) | 2 |
| Saunders | United Kingdom | 2014 Nov 12 | 2025 Apr 29 (continuing) | 1 |
| Etna | Italy | 2013 Sep 3 | 2022 Jun 17 | 3 |
| Heard | Australia | 2012 Sep 5 ± 4 days | 2025 Apr 4 (continuing) | 0 |
| Reventador | Ecuador | 2008 Jul 27 | 2025 May 2 (continuing) | 2 |
| Ibu | Indonesia | 2008 Apr 5 | 2025 May 2 (continuing) | 1 |
| Popocatepetl | Mexico | 2005 Jan 9 | 2025 May 2 (continuing) | 2 |
| Suwanosejima | Japan | 2004 Oct 23 | 2025 May 2 (continuing) | 2 |
| Nyiragongo | DR Congo | 2002 May 17 (?) | 2025 May 1 (continuing) | 2 |
| Fuego | Guatemala | 2002 Jan 4 | 2025 May 2 (continuing) | 3 |
| Bagana | Papua New Guinea | 2000 Feb 28 (in or before) | 2025 Apr 8 (continuing) | 2 |
| Sheveluch | Russia | 1999 Aug 15 | 2025 May 2 (continuing) | 4 |
| Erebus | Antarctica | 1972 Dec 16 (on or before) ± 15 days | 2025 Mar 16 (continuing) | 2 |
| Erta Ale | Ethiopia | 1967 Jul 2 (in or before) ± 182 days | 2025 May 2 (continuing) | 0 |
| Stromboli | Italy | 1934 Feb 2 | 2025 May 2 (continuing) | 2 |
| Dukono | Indonesia | 1933 Aug 13 | 2025 May 2 (continuing) | 3 |
| Santa Maria | Guatemala | 1922 Jun 22 | 2025 May 2 (continuing) | 3 |
| Yasur | Vanuatu | 1270 ± 110 years | 2025 May 2 (continuing) | 3 |
List of Questions
Global Volcanism Program, 2024. [Database] Volcanoes of the World (v. 5.2.8; 6 May 2025). Distributed by Smithsonian Institution, compiled by Venzke, E. https://doi.org/10.5479/si.GVP.VOTW5-2024.5.2
