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 |
|---|---|---|---|
| 7 June 2015 | 13 August 2021 | 1 | MacKenney Crater · Observations: Reported |
| 25 August 2014 | 17 February 2015 | 1 | MacKenney Crater · Observations: Reported |
| 5 March 2013 | 10 April 2014 | 2 | MacKenney Crater · Observations: Reported |
| 9 March 2006 | 26 October 2010 | 3 | MacKenney Cone · Observations: Reported |
| 19 July 2004 | 11 September 2005 | 3 | MacKenney Cone and lower S flank · Observations: Reported |
| 30 May 2002 | 17 June 2002 | 1 | MacKenney Crater · Observations: Reported |
| 31 October 2001 | 31 October 2001 | 1 | MacKenney Crater · Observations: Reported |
| 16 August 2000 | 5 July 2001 | 1 | MacKenney Crater · Observations: Reported |
| 4 January 1990 | 1 March 2000 | 3 | MacKenney Crater and flank vents · Observations: Reported |
| 4 July 1965 | 10 March 1989 | 3 | MacKenney Crater and flank vents · Observations: Reported |
| 11 March 1961 | 15 April 1961 | 2 | Cachajinas vent (South flank, 1860 m) · Observations: Reported |
| 16 December 1885 | — | 2 | Observations: Reported |
| 16 February 1846 | — | 2 | Cerro Chino · Observations: Reported |
| 2 July 1805 | — | 2 | Observations: Reported |
| 1 July 1775 | 23 July 1775 | 3 | Cerro Chino (SW flank and summit) · Observations: Reported |
| 29 June 1699 | — | 2 | Observations: Reported |
| 1693 | — | 2 | Observations: Reported |
| 1690 | — | 2 | Observations: Reported |
| 26 March 1687 | 27 March 1687 | 2 | Observations: Reported |
| August 1678 | — | 2 | Observations: Reported |
| July 1674 | — | 2 | Observations: Reported |
| August 1671 | — | 2 | Observations: Reported |
| August 1668 | 29 June 1669 | 2 | Observations: Reported |
| 1664 | — | 3 | Observations: Reported |
| July 1655 | — | 2 | Observations: Reported |
| 18 February 1651 | 13 April 1651 | 2 | Observations: Reported |
| c. 1623 | — | 3 | Observations: Reported |
| August 1565 | — | 3 | Cerro Chino · Observations: Reported |
| 1360 ± 75 years | — | 3 | Cerro Chino · Isotopic: 14C (uncalibrated) |
| 1160 ± 75 years | — | 3 | MacKenney Crater · Isotopic: 14C (uncalibrated) |
| 880 ± 500 years | — | 3 | Correlation: Tephrochronology |
| 400 ± 50 years | — | 2 | Isotopic: 14C (uncalibrated) |
Data: Global Volcanism Program, Smithsonian Institution (#342110)