Lassen Peak with the Loomis Hot Rock in the foreground, 1915 and 1984.

(left image) Lassen Peak, 1915, and devastated area with the Loomis Hot Rock in the foreground. The rock was ejected from the volcano during the 1915 event and was too hot to touch for several days after the eruption. (right image) Photograph from the same location in 1984 with Hot Rock surrounded by trees and Lassen Peak in the background.