Eruption history
VEI – Volcanic Explosivity Index: 0 = lava outpouring, 4 = like Eyjafjallajökull 2010, 6 = like Pinatubo 1991, 7 = like Tambora 1815. The scale is logarithmic – each step is about 10 times more material.
| Start | End | VEI | Vent and dating |
|---|---|---|---|
| 11 May 2019 | 12 July 2019 | 1 | Observations: Reported |
| 6 January 2013 | 7 March 2017 | 3 | Summit crater · Observations: Reported |
| 22 November 1997 | 21 June 2011 | 3 | 1994 crater · Observations: Reported |
| 21 July 1994 | 21 July 1994 | 1 | West of 1987 explosion crater · Observations: Reported |
| 1 March 1991 | 16 October 1991 | 2 | Observations: Reported |
| 2 July 1987 | 2 July 1987 | 1 | East side of summit lava dome · Observations: Reported |
| 2 July 1985 | 5 January 1986 | 1 | Observations: Reported |
| 16 December 1977 | 16 June 1982 | 1 | Observations: Reported |
| 11 December 1975 | 20 June 1976 | 2 | Observations: Reported |
| 2 July 1963 | 2 July 1970 | 1 | Observations: Reported |
| 2 July 1961 | 1 December 1962 | 1 | Observations: Reported |
| 14 May 1957 | 2 July 1960 | 1 | Observations: Reported |
| 2 July 1926 ± 4 years | 2 July 1931 | 1 | Observations: Reported |
| 17 January 1913 | 24 January 1913 | 4 | Observations: Reported |
| 18 December 1908 | 1 July 1909 | 3 | Observations: Reported |
| 2 July 1904 | 2 July 1906 | 1 | Observations: Reported |
| 15 February 1903 | 30 October 1903 | 3 | Observations: Reported |
| 4 December 1893 | 2 July 1902 | 2 | Observations: Reported |
| 16 July 1891 | 16 June 1892 | 2 | Observations: Reported |
| 18 November 1890 | — | 2 | Observations: Reported |
| 9 August 1889 | 16 February 1890 | 4 | Observations: Reported |
| 2 July 1887 | — | 0 | Observations: Reported |
| 26 December 1885 | 16 October 1886 | 3 | Observations: Reported |
| 2 July 1882 | 2 July 1884 | 1 | Observations: Reported |
| 1 December 1880 | 12 April 1881 | 2 | Observations: Reported |
| 23 December 1879 | 30 April 1880 | 1 | Summit vent and SW flank · Observations: Reported |
| 2 July 1875 | 2 July 1878 | 1 | NE flank (El Volcancito) · Observations: Reported |
| 12 June 1874 | — | 1 | NE flank (El Volcancito) · Observations: Reported |
| 26 February 1872 | 27 March 1873 | 3 | El Volcancito and main crater · Observations: Reported |
| 2 July 1870 | 2 July 1871 | 0 | NE flank (El Volcancito) · Observations: Reported |
| 12 June 1869 | 24 August 1869 | 3 | NE flank (El Volcancito) · Observations: Reported |
| 2 July 1819 | — | 1 | Observations: Reported |
| 15 February 1818 | 16 February 1818 | 4 | Observations: Reported |
| 2 July 1806 | 2 July 1809 | 2 | Observations: Reported |
| 2 July 1804 | — | 2 | Observations: Reported |
| March 1795 | September 1795 | 2 | Observations: Reported |
| August 1794 | — | 2 | Observations: Reported |
| 26 November 1780 | — | 2 | Observations: Reported |
| 1771 | — | 3 | Observations: Reported |
| 10 March 1770 | 12 March 1770 | 3 | Observations: Reported |
| 1769 | — | 2 | Observations: Reported |
| 1744 | — | 2 | Observations: Reported |
| 22 October 1743 | — | 2 | Observations: Reported |
| 1711 | — | 3 | Observations: Reported |
| 1690 | — | 3 | Observations: Reported |
| 8 June 1622 | 9 June 1622 | 4 | Observations: Reported |
| 15 April 1611 | 1613 | 3 | Observations: Reported |
| 25 November 1606 | 13 December 1606 | 4 | Observations: Reported |
| 14 January 1590 | 15 January 1590 | 3 | Observations: Reported |
| 10 January 1585 | — | 4 | Observations: Reported |
| 1576 | — | 3 | Observations: Reported |
| 1560 | — | 2 | Observations: Reported |
| 1519 | 1523 | 3 | Observations: Reported |
| 1110 ± 200 years | — | ? | Isotopic: 14C (calibrated) |
| 730 ± 100 years | — | ? | Isotopic: 14C (uncalibrated) |
| 540 ± 150 years | — | ? | Isotopic: 14C (calibrated) |
| 650 BCE ± 200 years | — | ? | Isotopic: 14C (calibrated) |
| c. 1,140 BCE | — | ? | Isotopic: 14C (uncalibrated) |
| 1,170 BCE ± 200 years | — | ? | Isotopic: 14C (calibrated) |
| c. 1,320 BCE | — | ? | Isotopic: 14C (uncalibrated) |
| 1,450 BCE ± 100 years | — | ? | Isotopic: 14C (uncalibrated) |
| 1,890 BCE ± 75 years | — | ? | Isotopic: 14C (uncalibrated) |
| 1,940 BCE ± 300 years | — | ? | Isotopic: 14C (calibrated) |
| 2,370 BCE ± 150 years | — | 4 | Isotopic: 14C (uncalibrated) |
| 2,800 BCE ± 100 years | — | ? | Isotopic: 14C (calibrated) |
| 3,030 BCE ± 50 years | — | ? | Isotopic: 14C (uncalibrated) |
| 3,180 BCE ± 100 years | — | ? | Isotopic: 14C (calibrated) |
| c. 3,270 BCE | — | ? | Correlation: Tephrochronology |
| 3,350 BCE ± 300 years | — | ? | Isotopic: 14C (calibrated) |
| 3,510 BCE ± 200 years | — | ? | Isotopic: 14C (calibrated) |
| 3,600 BCE ± 200 years | — | ? | Isotopic: 14C (calibrated) |
| 4,110 BCE ± 100 years | — | ? | Isotopic: 14C (calibrated) |
| 4,430 BCE ± 300 years | — | ? | Isotopic: 14C (calibrated) |
| 4,500 BCE ± 200 years | — | ? | Isotopic: 14C (uncalibrated) |
| 4,960 BCE ± 200 years | — | ? | Isotopic: 14C (uncalibrated) |
| 5,880 BCE ± 200 years | — | ? | Isotopic: 14C (calibrated) |
| 6,320 BCE ± 200 years | — | ? | Isotopic: 14C (uncalibrated) |
| 7,420 BCE ± 500 years | — | ? | Isotopic: 14C (uncalibrated) |
| 7,690 BCE ± 500 years | — | ? | Isotopic: 14C (uncalibrated) |
Data: Global Volcanism Program, Smithsonian Institution (#341040)