Hello and welcome to CoreFacts, where we're always short on
time and big on science. I'm Steve Sobieszczyk. Today we're going to mix some
science and history.
What volcanoes have erupted in the lower 48 States since the Nation was
founded?
Since 1776, there have been more than a dozen periods of
eruptive activity by at least one of the volcanoes from the Cascade
Range. The most active volcano has been Mount
St. Helens, which erupted multiple times including in the late
1700's, 1800 to 1857, 1980 to 1986, and 2004 to basically now. Lassen Peak, in California, erupted
between 1914 and 1917. Mount Rainier erupted
in the early 1800's and again in 1894. Mount Hood, in Oregon, erupted in the late 1700's and again
between 1856 and 1865. Mount Shasta, in California,
erupted in 1786. Glacier Peak was volcanically
active from the 1600's through the 1700's. And lastly, Mount Baker, in Washington, was active
between 1840 and 1870, with some steam emissions present in 1975 and later.
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