Most people tend to think of the Earth's surface as a static thing. It is solid and persistent ... however, that is far from the truth. Images from earthquakes show how land can be broken and buckled ...

CHESTER — The final snowpack survey of the year took a bit more effort for the PG&E team at Lassen Volcanic National Park. In the dense, late April snow, PG&E hydrographers drilled through 211 inches ...

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In about the time it takes to drive from San Francisco to Yosemite Valley or Lake Tahoe, you could be starting a hike to the top of one of California's tallest volcanoes. September is the magic month ...

When you gain the rim of the caldera at Lassen Peak, you realize in a flash why you came this far. As you top the rise, hardened lava flows extend in the caldera in front of you, a jumble of crags and ...

One hundred years ago, a mere geologic eye blink, tectonic plates did a little twerking, and Lassen Peak roiled and rumbled, bubbled and blew. Boulders the size of Buicks and ash as fine as a single ...