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Which Cascade volcano erupted in 1914–17?
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Pacific mountain system
Coast Mountains along the Torres Channel, an arm of Atlin Lake, northwestern British Columbia, Canada.
The Cascade volcano that erupted between 1914 and 1917 is Lassen Peak, located in northern California.123
Prior to the 1980 eruption of Mount St. Helens, the activity at Lassen Peak was the most recent volcanic eruption in the 48 conterminous United States. The eruptions began on May 30, 1914, and continued with various explosive events until 1917.213