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Eruption History

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Image Collage of Landsat, pollinator, and volcanologist

Eruption History for Mount Mazama and Crater Lake Caldera

Eruption History for Mount Mazama and Crater Lake Caldera
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Cascades Volcano Observatory, Crater Lake
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Eruption History for Mount Mazama and Crater Lake Caldera

Eruption History for Mount Mazama and Crater Lake Caldera
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Crater Lake bathymetric map showing the geology of the caldera floo...

Post-Caldera Volcanism and Crater Lake

Since the climactic eruption of Mount Mazama, “postcaldera volcanism,” has been confined within the caldera.
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Cascades Volcano Observatory, Crater Lake
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Post-Caldera Volcanism and Crater Lake

Since the climactic eruption of Mount Mazama, “postcaldera volcanism,” has been confined within the caldera.
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Mount Mazama eruption—artistic rendering painted by Paul Rockwood....

Geology and History Summary for Mount Mazama and Crater Lake

Mount Mazama is one of the major volcanoes of the Cascades Arc.
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Cascades Volcano Observatory, Crater Lake
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Geology and History Summary for Mount Mazama and Crater Lake

Mount Mazama is one of the major volcanoes of the Cascades Arc.
Learn More