What was erupting in the year...?
There were 58 confirmed eruptions at some point during 1964 from 54 different volcanoes; 29 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 (30 December 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 | Eruption Type | Max VEI |
|---|---|---|---|---|---|
| Poas | Costa Rica | 1964 Dec 25 | 1965 Mar 16 ± 15 days | Explosive / Effusive | 2 |
| Bezymianny | Russia | 1964 Dec 25 | 1964 Dec 26 | Explosive / Effusive | 1 |
| Piton de la Fournaise | France | 1964 Dec 21 | 1965 Feb 15 | Explosive / Effusive | 2 |
| Dieng Volcanic Complex | Indonesia | 1964 Dec 13 | 1964 Dec 13 | Explosive / Effusive | 1 |
| Langila | Papua New Guinea | 1964 Dec 4 ± 4 days | 1966 Sep 23 ± 3 days | Explosive / Effusive | 2 |
| Raoul Island | New Zealand | 1964 Nov 19 | 1965 Apr 25 (?) | Explosive / Effusive | 2 |
| Sheveluch | Russia | 1964 Nov 12 | 1964 Nov 12 | Explosive / Effusive | 4 |
| San Miguel | El Salvador | 1964 Oct 23 | 1964 Nov 16 ± 15 days | Explosive / Effusive | 2 |
| Asosan | Japan | 1964 Oct 16 ± 15 days | 1966 Dec 16 ± 15 days | Explosive / Effusive | 2 |
| Tupungatito | Chile-Argentina | 1964 Aug 3 | 1964 Sep 19 (on or after) | Explosive / Effusive | 2 |
| Kerinci | Indonesia | 1964 Jul 8 | 1964 Jul 8 (?) | Explosive / Effusive | 2 |
| Llaima | Chile | 1964 Jul 2 ± 182 days | Unknown | 2 | |
| Southern EPR at 8°S | Undersea Features | 1964 Jul 2 (?) ± 182 days | 1969 Jul 2 (?) ± 182 days | Submarine | 0 |
| Bezymianny | Russia | 1964 Jun 25 | 1964 Sep 20 | Explosive / Effusive | 2 |
| Akan | Japan | 1964 Jun 18 | 1964 Jul 4 (?) | Explosive / Effusive | 1 |
| Trident | United States | 1964 May 31 | Unknown | 3 | |
| Asosan | Japan | 1964 May 14 | 1964 May 14 | Explosive / Effusive | 1 |
| Piton de la Fournaise | France | 1964 Apr 30 | 1964 May 8 | Explosive / Effusive | 2 |
| Bagana | Papua New Guinea | 1964 Apr 24 | 1965 Jul 2 ± 182 days | Explosive / Effusive | 2 |
| Kiska | United States | 1964 Mar 18 | Unknown | 0 | |
| Tolbachik | Russia | 1964 Mar 16 ± 15 days | 1964 Apr 24 (on or after) | Explosive / Effusive | 2 |
| Nila | Indonesia | 1964 Mar 16 ± 15 days | 1964 Mar 16 ± 15 days | Explosive / Effusive | 1 |
| Westdahl | United States | 1964 Mar 10 | 1964 Apr 16 | Explosive / Effusive | 2 |
| Villarrica | Chile | 1964 Mar 2 | 1964 Apr 21 | Explosive / Effusive | 2 |
| Ambrym | Vanuatu | 1964 Feb 16 (?) ± 15 days | 1966 Sep 16 (on or after) ± 15 days | Explosive / Effusive | 2 |
| Dempo | Indonesia | 1964 Feb 14 | 1964 Feb 14 | Explosive / Effusive | 2 |
| Sirung | Indonesia | 1964 Feb 8 | 1964 Oct 5 (on or after) | Explosive / Effusive | 1 |
| Chikurachki | Russia | 1964 Feb 1 | 1964 Feb 16 ± 15 days | Explosive / Effusive | 2 |
| Sangeang Api | Indonesia | 1964 Jan 29 | 1965 Dec 1 ± 30 days | Explosive / Effusive | 2 |
| Paluweh | Indonesia | 1963 Dec 31 | 1966 Mar 16 | Explosive / Effusive | 2 |
| Lokon-Empung | Indonesia | 1963 Dec 17 | 1964 Apr 16 ± 15 days | Explosive / Effusive | 2 |
| Kavachi | Solomon Islands | 1963 Dec 14 | 1964 Jan 31 (?) | Explosive / Effusive | 2 |
| Manam | Papua New Guinea | 1963 Nov 26 | 1964 Apr 16 ± 15 days | Explosive / Effusive | 2 |
| Klyuchevskoy | Russia | 1963 Nov 13 | 1964 Dec 16 (?) ± 15 days | Explosive / Effusive | 1 |
| Asosan | Japan | 1963 Nov 10 | 1964 Jan 16 ± 15 days | Explosive / Effusive | 2 |
| Vestmannaeyjar | Iceland | 1963 Nov 8 | 1967 Jun 5 | Explosive / Effusive | 3 |
| Augustine | United States | 1963 Oct 11 | 1964 Aug 19 | Explosive / Effusive | 2 |
| Batur | Indonesia | 1963 Sep 5 | 1964 May 10 | Explosive / Effusive | 2 |
| Lopevi | Vanuatu | 1963 Jul 7 | 1965 Jul 2 ± 182 days | Explosive / Effusive | 3 |
| Colima | Mexico | 1963 Jul 2 ± 182 days | 1970 Jul 2 ± 182 days | Explosive / Effusive | 1 |
| Irazu | Costa Rica | 1963 Mar 13 | 1965 Feb 13 | Explosive / Effusive | 3 |
| Ebeko | Russia | 1963 Mar 8 | 1964 Jul 2 ± 182 days | Explosive / Effusive | 1 |
| Agung | Indonesia | 1963 Feb 18 | 1964 Jan 27 | Explosive / Effusive | 5 |
| Rumble III | New Zealand | 1963 Jan 16 ± 15 days | 1966 Dec 16 (on or after) ± 15 days | Explosive / Effusive | 0 |
| Izu-Oshima | Japan | 1962 Jan 16 ± 15 days | 1965 May 16 ± 15 days | Explosive / Effusive | 1 |
| Karymsky | Russia | 1960 Apr 16 ± 15 days | 1964 Dec 16 ± 15 days | Explosive / Effusive | 3 |
| Ol Doinyo Lengai | Tanzania | 1960 Mar 16 (on or before) ± 15 days | 1966 Nov 28 ± 30 days | Explosive / Effusive | 3 |
| Lascar | Chile | 1959 Nov 16 ± 15 days | 1968 Jan 31 (on or after) | Explosive / Effusive | 2 |
| Etna | Italy | 1959 Oct 17 | 1964 Dec 31 | Explosive / Effusive | 3 |
| Suwanosejima | Japan | 1956 Nov 16 ± 15 days | 1984 May 16 ± 15 days | Explosive / Effusive | 2 |
| Aira | Japan | 1955 Oct 13 | 2016 Aug 22 | Explosive / Effusive | 3 |
| Semeru | Indonesia | 1950 Jul 23 | 1964 Dec 16 ± 15 days | Explosive / Effusive | 2 |
| Sangay | Ecuador | 1934 Aug 8 | 2011 Mar 2 | Explosive / Effusive | 3 |
| Stromboli | Italy | 1934 Feb 2 | 2025 Dec 17 (continuing) | Explosive / Effusive | 2 |
| Dukono | Indonesia | 1933 Aug 13 | 2025 Dec 17 (continuing) | Explosive / Effusive | 3 |
| Nyiragongo | DR Congo | 1927 Mar 16 ± 15 days | 1977 Jan 10 | Lava Lake | 1 |
| Santa Maria | Guatemala | 1922 Jun 22 | 2025 Dec 17 (continuing) | Explosive / Effusive | 3 |
| Yasur | Vanuatu | 1270 ± 110 years | 2025 Dec 17 (continuing) | Explosive / Effusive | 3 |
List of Questions
Global Volcanism Program, 2025. [Database] Volcanoes of the World (v. 5.3.4; 30 Dec 2025). Distributed by Smithsonian Institution, compiled by Venzke, E. https://doi.org/10.5479/si.GVP.VOTW5-2025.5.3
