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Lava Flows

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Mount St. Helens simplified hazards map showing potential impact area for ground-based hazards during a volcanic eve

Volcanic Hazards at Mount St. Helens

Mount St. Helens' high frequency of eruptions during the recent geologic past and its two eruptive episodes of the past three decades indicate a high probability of renewed eruptive activity.
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Cascades Volcano Observatory, Mount St. Helens
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Volcanic Hazards at Mount St. Helens

Mount St. Helens' high frequency of eruptions during the recent geologic past and its two eruptive episodes of the past three decades indicate a high probability of renewed eruptive activity.
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