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 ...
Lassen Peak had its most powerful explosion in a series of eruptions that occurred between 1914 and 1917. Take a look at ...
For over a century, geologists were baffled by the rolling mounds scattered across Northern California's Shasta Valley. Travelers along Interstate 5 can glimpse these unusual hills and ridges, often ...
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