Home › Decades

Eruptions starting in the 1840s

Eruptions147

Volcanoes87

Largest VEI5

By country

Indonesia59

Russia11

United States10

France9

Ecuador8

Japan7

Philippines4

Chile4

Italy4

Costa Rica4

Tonga4

Colombia3

Nearby decades

1790s78

1800s74

1810s82

1820s125

1830s110

1840s ◀147

1850s173

1860s175

1870s175

1880s220

1890s218

Start	Volcano	Country	VEI
1840-01-04	Merapi	Indonesia	1
1840-01-20	Ragang	Philippines	2
1840-02-02	Gamalama	Indonesia	3
1840-05-20	Guntur	Indonesia	2
1840-07-02	Ararat	Turkiye	3
1840-07-02	Klyuchevskoy	Russia	2
1840-07-02	Kuchinoerabujima	Japan	2
1840-07-02	Purace	Colombia	2
1840-07-02	Ruang	Indonesia	2
1840-07-02	Southern EPR at 17.5°S (Segment K)	Undersea Features	0
1840-07-02	Tinakula	Solomon Islands	3
1840-11-12	Gede-Pangrango	Indonesia	3
1841-01-28	Erebus	Antarctica	1
1841-03-15	Hunter Island	France - claimed by Vanuatu	–
1841-05-23	Kuchinoerabujima	Japan	2
1841-07-02	Tongariro	New Zealand	2
1841-07-02	Villarrica	Chile	2
1841-07-16	Lamongan	Indonesia	2
1841-09-20	Vesuvius	Italy	2
1841-11-14	Guntur	Indonesia	2
1842-01-16	Semeru	Indonesia	2
1842-01-24	Tengger Caldera	Indonesia	2
1842-02-16	Deception Island	Antarctica	2
1842-03-15	Bagana	Papua New Guinea	1
1842-04-16	Fournaise, Piton de la	France	0
1842-06-16	Milna	Russia	3
1842-07-02	Irazu	Costa Rica	2
1842-07-02	Izalco	El Salvador	2
1842-07-02	Kerinci	Indonesia	2
1842-07-02	Shishaldin	United States	2
1842-07-02	Taal	Philippines	2
1842-07-02	Tangkuban Parahu	Indonesia	–
1842-10-06	Gamalama	Indonesia	1
1842-11-18	Etna	Italy	2
1842-11-22	St. Helens	United States	3
1843-01-04	Guntur	Indonesia	3
1843-01-09	Mauna Loa	United States	0
1843-01-16	Tengger Caldera	Indonesia	2
1843-04-10	Gamalama	Indonesia	2
1843-07-02	Agung	Indonesia	5
1843-07-02	Baker	United States	3
1843-07-02	Fournaise, Piton de la	France	0
1843-07-02	Reventador	Ecuador	2
1843-07-02	Tangkoko-Duasudara	Indonesia	2
1843-07-16	Atitlan	Guatemala	2
1843-07-16	Ketoi	Russia	2
1843-07-28	Gede-Pangrango	Indonesia	2
1843-08-16	Lamongan	Indonesia	2
1843-10-21	Talang	Indonesia	2
1843-11-17	Etna	Italy	2
1843-11-26	Guntur	Indonesia	2
1843-12-07	Reventador	Ecuador	3
1844-03-19	Fournaise, Piton de la	France	2
1844-04-07	Iwakisan	Japan	2
1844-05-16	Iya	Indonesia	2
1844-05-16	Rincon de la Vieja	Costa Rica	2
1844-06-16	Izalco	El Salvador	2
1844-07-02	Cotopaxi	Ecuador	2
1844-07-02	Negra, Sierra	Ecuador	0
1844-07-02	Reventador	Ecuador	3
1844-07-25	San Miguel	El Salvador	2
1844-08-16	Serua	Indonesia	2
1844-09-25	Semeru	Indonesia	2
1844-10-16	Tongariro	New Zealand	2
1844-11-09	Tengger Caldera	Indonesia	2
1844-12-16	Fournaise, Piton de la	France	2
1845-01-16	Semeru	Indonesia	2
1845-01-20	Mayon	Philippines	3
1845-01-23	Gede-Pangrango	Indonesia	2
1845-02-08	Soputan	Indonesia	2
1845-02-19	Ruiz, Nevado del	Colombia	3
1845-02-26	Antuco	Chile	2
1845-04-04	Iwakisan	Japan	2
1845-04-16	Cotopaxi	Ecuador	2
1845-04-22	Talang	Indonesia	2
1845-07-01	Tofua	Tonga	0
1845-07-02	Ambang	Indonesia	–
1845-07-02	Fournaise, Piton de la	France	0
1845-07-02	Kolokol Group	Russia	2
1845-08-12	Pavlof	United States	2
1845-09-02	Hekla	Iceland	4
1845-11-16	Marapi	Indonesia	2
1846-02-16	Pacaya	Guatemala	2
1846-04-06	Merapi	Indonesia	2
1846-05-11	Mayon	Philippines	3
1846-05-19	Gamalama	Indonesia	2
1846-05-27	Tangkuban Parahu	Indonesia	2
1846-06-11	Fonualei	Tonga	4
1846-07-02	Fournaise, Piton de la	France	0
1846-07-02	Izu-Oshima	Japan	2
1846-07-02	Kharimkotan	Russia	2
1846-07-02	Mahawu	Indonesia	2
1846-07-02	Orizaba, Pico de	Mexico	2
1846-07-02	Rasshua	Russia	3
1846-07-02	Sinarka	Russia	3
1846-08-16	Nasudake	Japan	1
1846-08-16	Pavlof	United States	2
1846-09-02	Merapi	Indonesia	3
1846-09-10	Rinjani	Indonesia	2
1846-09-16	Serua	Indonesia	2
1846-10-04	Campi Flegrei del Mar di Sicilia	Italy	2
1846-11-06	Fernandina	Ecuador	0
1846-11-18	Esan	Japan	1
1846-11-26	Azul, Cerro	Chile	2
1847-02-07	Gamalama	Indonesia	2
1847-03-20	Slamet	Indonesia	2
1847-03-26	Lamongan	Indonesia	2
1847-03-26	St. Helens	United States	2
1847-04-09	Fogo	Cabo Verde	2
1847-05-18	Irazu	Costa Rica	2
1847-07-02	Fournaise, Piton de la	France	0
1847-07-02	Tara, Batu	Indonesia	2
1847-07-10	Kao	Tonga	2
1847-07-10	Tofua	Tonga	1
1847-09-07	Gamalama	Indonesia	–
1847-09-25	Lamongan	Indonesia	2
1847-10-16	Guntur	Indonesia	2
1847-10-17	Gede-Pangrango	Indonesia	2
1847-10-27	Purace	Colombia	3
1847-12-04	Dieng Volcanic Complex	Indonesia	2
1848-02-16	Semeru	Indonesia	2
1848-03-05	Akutan	United States	2
1848-04-01	St. Helens	United States	2
1848-05-08	Gede-Pangrango	Indonesia	2
1848-05-16	Kelud	Indonesia	3
1848-07-02	Fournaise, Piton de la	France	0
1848-07-02	Karthala	Union of the Comoros	0
1848-07-02	Kharimkotan	Russia	2
1848-07-02	Klyuchevskoy	Russia	2
1848-07-02	Lascar	Chile	2
1848-07-02	Mutnovsky	Russia	3
1848-07-02	Tomariyama [Golovnin]	Japan - administered by Russia	1
1848-08-04	Semeru	Indonesia	2
1849-04-26	Merapi	Indonesia	2
1849-05-16	Mauna Loa	United States	0
1849-06-16	Lamongan	Indonesia	2
1849-07-02	Batur	Indonesia	2
1849-07-02	Fournaise, Piton de la	France	0
1849-07-02	Milna	Russia	2
1849-07-02	Momotombo	Nicaragua	2
1849-07-02	Rincon de la Vieja	Costa Rica	2
1849-09-14	Merapi	Indonesia	3
1849-09-27	Wolf	Ecuador	0
1849-10-06	Lewotolok	Indonesia	2
1849-11-27	Gamalama	Indonesia	2
1849-12-01	Raung	Indonesia	–
1849-12-01	Slamet	Indonesia	2

← 1830s 1850s →

Older decades are less completely recorded; counts also reflect better observation. Eruption records from the Smithsonian Global Volcanism Program; older eruptions may be missing. VEI = Volcanic Explosivity Index (0–8). For current alerts, check the official agency.