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 |
|---|---|---|---|
| 21 June 1916 | — | 0 | Just west of Smith Rock · Observations: Reported |
| 16 May 1870 | — | 2 | 18 km SW of Smith Rock · Observations: Reported |
Data: Global Volcanism Program, Smithsonian Institution (#284080)