The tree stump and strip of red bark fragments in the foreground are the remnants of one of the many trees blown down radially away from the volcano by a pyroclastic surge on May 22, 1915, during the paroxysmal phase of the 1914-1917 eruption of Lassen Peak. The Devastated Area in the background remained sparsely vegetated for many decades following the eruption.

Photo by Lee Siebert, 1982 (Smithsonian Institution).

This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

Lassen Volcanic Center