Nature
30 Years Later: The Anniversary of the Eruption of Mount St. Helens
When Mount St. Helens erupted, it spread approximately 540 million tons of ash over more than 22,000 square miles surrounding Washington state
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When Mount St. Helens erupted, it spread approximately 540 million tons of ash over more than 22,000 square miles surrounding Washington state
Jamie Simon
Page 39 of 45