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Global Volcanism Program | Image GVP-02939

An ash plume rises above a rockfall on the south side of the Mount St. Helens dome during a period of lava dome growth in June 1985. Lava dome growth occurred intermittently from 1980 to 1986. Photo by Gene Iwatsubo, 1985 (U.S. Geological Survey).

An ash plume rises above a rockfall on the south side of the Mount St. Helens dome during a period of lava dome growth in June 1985. Lava dome growth occurred intermittently from 1980 to 1986.

Photo by Gene Iwatsubo, 1985 (U.S. Geological Survey).

Keywords: lava dome | collapse scarp | crater | plume | degassing | avalanche | ash


St. Helens