A river that drained the slopes of a now-vanished volcano may have carved Yosemite Valley's depths during the last 10 million ...

Over the Sierra crest — about 150 miles to the east of Manteca, Oakdale, and Turlock — is one of the world’s largest active ...

A submarine volcano 300 miles off the coast of Oregon could erupt for the first time since 2015, spewing “very fluid lava” ...

A massive underwater volcano, Axial Seamount, 300 miles off Oregon’s coast, may erupt soon after over 1,000 daily quakes and ...

Shasta Valley's strange hills reveal a secret — the debris of a massive ancient mountain collapse in Northern California.

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Night - Mostly cloudy. Winds from NW to NNW at 5 to 6 mph (8 to 9.7 kph). The overnight low will be 44 °F (6.7 °C). Mostly cloudy with a high of 63 °F (17.2 °C). Winds variable at 5 to 8 mph ...