This is a list of volcanic eruptions of the 19th Century measuring a Volcanic Explosivity Index (VEI) of at least 4. Note that there may be many other eruptions that have not been identified, and estimates for the size of eruptions can be subject to considerable uncertainties.
| VEI | Volcano (eruption) | Year | Casualties | Notes |
|---|---|---|---|---|
| 4 | Pago | 1800 | ||
| 5 | Mount St. Helens | 1800 | ||
| 6 | Unknown source | 1809 | Greenland and Antarctic ice samples suggest an undocumented eruption roughly half the magnitude of Mount Tambora occurred, contributing to the 1810's being the coldest decade in at least 500 years.[1] | |
| 4 | La Soufrière | 1812 | ||
| 4 | Awu | 1812 | ||
| 4 | Suwanosejima | 1813 | ||
| 4 | Mount Mayon | 1814 | ||
| 7 | Mount Tambora (1815 eruption) | 1815 | >71,000 | Largest and deadliest volcanic eruption in recorded history. Caused the "Year Without a Summer" in 1816. |
| 4 | Raung | 1817 | ||
| 4 | Colima | 1818 | ||
| 4 | Mount Usu | 1822 | ||
| 5 | Galunggung | 1822 | 4,000 | |
| 4 | Isanotski | 1825 | ||
| 4 | Kelut | 1826 | ||
| 4 | Avachinsky | 1827 | ||
| 4 | Kliuchevskoi | 1829 | ||
| 4 | Babuyan Claro | 1831 | ||
| 5 | Cosiguina | 1835 | ||
| 4 | Hekla | 1845 | ||
| 4 | Fonualei | 1846 | ||
| 4 | Mount Usu | 1853 | ||
| 5 | Shiveluch | 1854 | ||
| 4 | Komaga-Take | 1856 | ||
| 4 | Volcan De Fuego | 1857 | ||
| 4 | Katla | 1860 | ||
| 4 | Makian | 1861 | ||
| 4 | Sinarka | 1872 | ||
| 4 | Mount Merapi | 1872 | ||
| 4 | Grímsvötn | 1873 | ||
| 5 | Askja | 1875 | ||
| 4 | Suwanosejima | 1877 | ||
| 4 | Cotopaxi | 1877 | ||
| 4 | Volcan De Fuego | 1880 | ||
| 6 | Krakatoa | 1883 | 36,417 | Heard 3,000 miles (4,800km) away. Caused a 5 year volcanic winter. |
| 4 | Mount Augustine | 1883 | ||
| 4 | Tungurahua | 1886 | ||
| 5 | Mount Tarawera | 1886 | 108+ | Largest historical eruption in New Zealand. |
| 4 | Niuafo'ou | 1886 | ||
| 4 | Mount Bandai | 1888 | 477+ | |
| 4 | Suwanosejima | 1889 | ||
| 4 | Colima | 1890 | ||
| 4 | Calbuco | 1893 | ||
| 4 | Mount Mayon | 1897 | ||
| 4 | Dona Juana | 1899 |