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 |
|---|---|---|---|
| 19 May 2007 | 21 May 2007 | 1 | Observations: Reported |
| 17 October 2006 | 17 October 2006 | 1 | Observations: Reported |
| 17 October 1974 | 17 October 1974 | 1 | 600-900 m W of Ritter Island · Observations: Reported |
| 9 October 1972 | 9 October 1972 | 1 | West of Ritter Island · Observations: Reported |
| 13 March 1888 | 13 March 1888 | 2 | Observations: Reported |
| 2 February 1887 | 5 February 1887 | 2 | Volcano Uncertain: Probably Ritter or Langila |
| 29 June 1793 | — | 2 | Observations: Reported |
| 3 April 1700 | 6 April 1700 | 3 | Observations: Reported |
Data: Global Volcanism Program, Smithsonian Institution (#251070)