 | Active Volcanoes; Cascade Range; Ejecta; Eruptions; Geologic Hazards; Stratovolcanoes; Volcanic Features; Volcanism; Volcanology | Plumes of steam, gas, and ash often occur on Mt. St. Helens. On clear days they can be seen from Portland, Oregon, 50 miles to the south. The plume photographed here in 1984 rose nearly 3000 feet above the volcano's rim. The view is from Harrys Ridge, five miles north of the mountain. |