Global Volcanism Program | Image GVP-04616
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 from low clouds 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).