What was erupting in the year...?
There were 64 confirmed eruptions at some point during 1984 from 59 different volcanoes; 33 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 March 2024). 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 |
|---|---|---|---|---|
| Ulawun | Papua New Guinea | 1984 Dec 30 | 1985 Jan 27 | 1 |
| Nevado del Ruiz | Colombia | 1984 Dec 22 | 1985 Mar 19 (?) | 1 |
| Concepcion | Nicaragua | 1984 Dec 16 ± 15 days | 1985 Jan 2 | 2 |
| Lascar | Chile | 1984 Dec 16 ± 15 days | 1985 Jul 16 ± 15 days | 0 |
| Veniaminof | United States | 1984 Nov 29 | 1984 Dec 6 (?) | 2 |
| Marapi | Indonesia | 1984 Nov 15 | 1984 Nov 15 | 1 |
| Ruapehu | New Zealand | 1984 Oct 25 (?) | 1984 Dec 16 ± 15 days | 1 |
| Suwanosejima | Japan | 1984 Oct 16 ± 15 days | 1984 Oct 16 ± 15 days | 2 |
| Mayon | Philippines | 1984 Sep 9 | 1984 Oct 6 | 3 |
| Krafla | Iceland | 1984 Sep 4 | 1984 Sep 18 | 0 |
| Ulawun | Papua New Guinea | 1984 Aug 23 | 1984 Sep 11 | 1 |
| Villarrica | Chile | 1984 Aug 11 | 1985 Nov 18 | 2 |
| Gorely | Russia | 1984 Aug 4 | 1986 Sep 21 (?) | 2 |
| Cleveland | United States | 1984 Jul 12 | 1984 Jul 12 | 1 |
| Ambrym | Vanuatu | 1984 Jul 2 ± 182 days | 1986 Mar 8 (in or after) | 2 |
| Tinakula | Solomon Islands | 1984 Jun 3 (in or before) | 1985 Jun 13 (in or after) | 2 |
| Soputan | Indonesia | 1984 May 24 | 1984 Aug 31 | 3 |
| Tengger Caldera | Indonesia | 1984 May 12 | 1984 May 31 | 1 |
| Paluweh | Indonesia | 1984 May 9 | 1984 May 21 | 2 |
| Akan | Japan | 1984 May 1 | 1984 May 1 | 1 |
| Llaima | Chile | 1984 Apr 20 | 1984 Nov 26 | 2 |
| Asosan | Japan | 1984 Apr 13 ± 3 days | 1985 Jun 24 | 1 |
| Ruapehu | New Zealand | 1984 Apr 2 | Unknown | 1 |
| Rincon de la Vieja | Costa Rica | 1984 Mar 31 | 1984 Apr 16 ± 15 days | 2 |
| Fernandina | Ecuador | 1984 Mar 30 | Unknown | 1 |
| Mauna Loa | United States | 1984 Mar 25 | 1984 Apr 15 | 0 |
| Sheveluch | Russia | 1984 Mar 17 | 1984 Sep 6 | 2 |
| Klyuchevskoy | Russia | 1984 Mar 10 | 1985 Jan 28 | 3 |
| Kaitoku Seamount | Japan | 1984 Mar 8 | 1984 Mar 26 (?) | 1 |
| Home Reef | Tonga | 1984 Mar 1 | 1984 Mar 5 | 3 |
| Nyamulagira | DR Congo | 1984 Feb 23 | 1984 Mar 14 | 2 |
| Bezymianny | Russia | 1984 Feb 5 | 1984 Dec 16 ± 15 days | 3 |
| Galunggung | Indonesia | 1984 Jan 9 | 1984 Jan 31 (?) | 1 |
| Whakaari/White Island | New Zealand | 1983 Dec 26 ± 5 days | 1984 Feb 12 ± 5 days | 2 |
| Teahitia | France | 1983 Dec 18 | 1984 Jul 14 | 0 |
| Piton de la Fournaise | France | 1983 Dec 4 | 1984 Feb 18 | 2 |
| Ulawun | Papua New Guinea | 1983 Nov 6 | 1984 Mar 13 | 1 |
| Macdonald | France | 1983 Oct 27 | 1984 Jan 3 | 0 |
| Veniaminof | United States | 1983 Jun 2 | 1984 Apr 17 | 3 |
| Karangetang | Indonesia | 1983 May 16 ± 15 days | 1988 Dec 31 (in or after) | 3 |
| Iliboleng | Indonesia | 1983 May 11 | 1984 Apr 13 | 2 |
| Kilauea | United States | 1983 Jan 3 | 2018 Sep 5 | 3 |
| Ol Doinyo Lengai | Tanzania | 1983 Jan 1 | 1993 Sep 24 | 2 |
| Pagan | United States | 1981 May 15 | 1985 May 1 (in or after) | 4 |
| St. Helens | United States | 1980 Mar 27 | 1986 Oct 28 ± 3 days | 5 |
| Etna | Italy | 1979 Jul 3 | 1993 Mar 30 | 2 |
| Manam | Papua New Guinea | 1974 Mar 4 (?) | 1999 Nov 9 (?) | 3 |
| Nevados de Chillan | Chile | 1973 Jul 16 ± 15 days | 1986 Jul 2 ± 182 days | 2 |
| Langila | Papua New Guinea | 1973 Feb 24 ± 4 days | 2000 Oct 16 (in or after) ± 15 days | 3 |
| Erebus | Antarctica | 1972 Dec 16 (in or before) ± 15 days | 2024 Mar 1 (continuing) | 2 |
| Merapi | Indonesia | 1972 Oct 6 | 1985 Mar 16 ± 15 days | 2 |
| Bagana | Papua New Guinea | 1972 Jul 2 ± 182 days | 1995 Jul 2 (in or after) ± 182 days | 2 |
| Arenal | Costa Rica | 1968 Jul 29 | 2010 Dec 16 (?) ± 15 days | 3 |
| Semeru | Indonesia | 1967 Aug 31 | 2009 Mar 15 | 3 |
| Erta Ale | Ethiopia | 1967 Jul 2 (in or before) ± 182 days | 2024 Mar 1 (continuing) | 0 |
| Masaya | Nicaragua | 1965 Oct 10 (?) | 1985 Apr 16 (?) ± 15 days | 1 |
| Pacaya | Guatemala | 1965 Jul 4 | 1989 Mar 10 | 3 |
| Suwanosejima | Japan | 1956 Nov 16 ± 15 days | 1984 May 16 ± 15 days | 2 |
| Aira | Japan | 1955 Oct 13 | 2016 Aug 22 | 3 |
| Sangay | Ecuador | 1934 Aug 8 | 2011 Mar 2 | 3 |
| Stromboli | Italy | 1934 Feb 2 | 2024 Mar 1 (continuing) | 2 |
| Dukono | Indonesia | 1933 Aug 13 | 2024 Mar 1 (continuing) | 3 |
| Santa Maria | Guatemala | 1922 Jun 22 | 2024 Mar 1 (continuing) | 3 |
| Yasur | Vanuatu | 1270 ± 110 years | 2024 Mar 1 (continuing) | 3 |
List of Questions
Global Volcanism Program, 2024. [Database] Volcanoes of the World (v. 5.1.6; 2 Mar 2024). Distributed by Smithsonian Institution, compiled by Venzke, E. https://doi.org/10.5479/si.GVP.VOTW5-2023.5.1
