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Global Volcanism Program | Image GVP-02869

The lateral blast of the 18 May 1980 Mount St. Helens eruption removed large standing trees near the volcano. The high-velocity rocky flow left jagged stumps with splinters facing away from the volcano and parallel to the direction of movement of the flow. This tree is about 2 m high, located 9 km N of the crater on Harry’s Ridge. Photo by Lee Siebert, 1984 (Smithsonian Institution).

The lateral blast of the 18 May 1980 Mount St. Helens eruption removed large standing trees near the volcano. The high-velocity rocky flow left jagged stumps with splinters facing away from the volcano and parallel to the direction of movement of the flow. This tree is about 2 m high, located 9 km N of the crater on Harry’s Ridge.

Photo by Lee Siebert, 1984 (Smithsonian Institution).

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

Galleries: Pyroclastic Flows

Keywords: explosive eruption | environmental impact | lateral blast | pyroclastic density current (PDC)


St. Helens