Global Volcanism Program | Image GVP-02831
Overlapping lava flows that erupted from summit vents during the first half of the 16th century are seen here on the SE flank of Mount St. Helens. During the same eruptive period lava flows also extended down the E and W flanks, and pyroclastic flows traveled down the N, W, S, and SE flanks. A thin line of standing trees separates the SE-flank lava flows from logging areas at the bottom of this 1978 photo.
Photo by Rick Hoblitt, 1978 (U.S. Geological Survey).
This image is made available as a Public Domain Work, but proper attribution is appreciated.