Mount Rainier volcano poses threat to Tacoma and South Seattle due to ancient mudflow risks.

Mount Rainier, a dormant volcano in Washington state, has not erupted in 1,000 years, but concerns its potential impact on Tacoma and South Seattle, which lie on 100-foot-thick ancient mudflows from previous eruptions, are keeping US volcanologists up at night. The danger lies not in fiery lava flows but in the volcano's potential to release deadly mudflows and debris.

June 23, 2024
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