On this day in 1915, Lassen Peak in California erupted

Lassen Peak had its most powerful explosion in a series of eruptions that occurred between 1914 and 1917. Take a look at ...
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One of California's riskiest volcanoes has been seeing more earthquakes. Is an eruption coming?

A scalding-hot pool of mineral water is shown at the Long Valley Caldera in 2019 near Mammoth Lakes. (George Rose / Getty Images) One of California's riskiest volcanoes has for decades been undergoing ...
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To study California’s largest active volcano, scientists first have to climb it

MOUNT SHASTA, Calif. – For some, Mount Shasta’s summit is a milestone. For others, it’s the office. Mount Shasta presents a unique challenge for U.S. Geological Survey (USGS) scientists. With a peak ...