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 |
|---|---|---|---|
| 26 June 1993 | 4 July 1993 | 0 | N end CoAxial segment, Juan de Fuca Ridge · Observations: Reported |
| 2 July 1986 ± 5 years | — | 0 | CoAxial segment, Juan de Fuca Ridge · Observations: Reported |
Data: Global Volcanism Program, Smithsonian Institution (#331020)