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 |
|---|---|---|---|
| 27 July 2008 | continuing | 2 | Observations: Reported |
| 15 March 2007 | 11 October 2007 | 2 | Observations: Reported |
| 7 November 2004 | 16 March 2006 | 2 | Observations: Reported |
| 3 November 2002 | 10 January 2003 | 4 | Summit and SE flank (2600 m) · Observations: Reported |
| 4 January 1976 | 16 May 1976 | 2 | Observations: Reported |
| 16 November 1973 | 16 July 1974 | 3 | Observations: Reported |
| 16 July 1972 | 16 September 1972 | 2 | Observations: Reported |
| 16 June 1960 | — | 3 | Observations: Reported |
| 16 November 1958 | — | 3 | Observations: Reported |
| 2 July 1955 | — | 2 | Observations: Reported |
| 24 February 1944 | 1 March 1944 | 3 | Observations: Reported |
| 27 August 1936 | — | 3 | Observations: Reported |
| 2 July 1929 | — | 3 | Observations: Reported |
| 5 January 1926 | 16 May 1926 | 3 | Observations: Reported |
| 16 February 1912 | 16 March 1912 | 3 | Observations: Reported |
| 8 April 1898 | 2 July 1906 | 3 | Observations: Reported |
| 2 July 1894 | — | 3 | Observations: Reported |
| 30 January 1871 | — | 2 | Observations: Reported |
| 12 December 1856 | 13 December 1856 | 3 | Observations: Reported |
| 2 July 1844 | — | 3 | Observations: Reported |
| 7 December 1843 | — | 3 | Observations: Reported |
| c. 2 July 1843 | — | 2 | Observations: Reported |
| January 1797 | — | 3 | Observations: Reported |
| 1691 | — | 3 | Observations: Reported |
| 1590 | — | 3 | Volcano Uncertain: possibly Antisana · Observations: Reported |
| April 1541 | — | 3 | Observations: Reported |
Data: Global Volcanism Program, Smithsonian Institution (#352010)