Plumes produced by degassing of a growing lava dome rise from the northern tip of Bogoslof on 21 July 1992. The 1992 eruption was first observed on 6 July when pilots saw steam and ash rising above the volcano. On 20 July an ash plume rose to 8 km. A new lava dome grew to a height of 100-m by the time the eruption ended in late July. The 1927 lava dome forms the dark land to the right with the pinnacle of Castle Rock behind it.

Photo by Larry Shaishnikoff, 1992 (courtesy of John Reeder, Alaska Div. Geology & Geophysical Surveys).

This image is made available under the Creative Commons BY-NC 4.0 license terms.

Keywords: island volcano | lava dome | erosion | eruption | steam | emissions | degassing | gas | volcanic gas

Bogoslof