An isolated region of northeast California offers a land ... and explore the amazing regional geology of Lassen Country. Backcountry Press, in Humboldt County, publishes and distributes the ...

A preliminary 3.6 magnitude earthquake struck in Lassen County in Northern California on Saturday morning, according to the United States Geological Survey. The quake, which struck at 11:48 a.m ...

the Lassen Volcanic Center in Shasta County and the Long Valley Caldera that includes the Mammoth Lakes area in Mono County remain in the highest risk category as defined by the U.S. Geological ...

A list of the four major types gives some idea of the geological complexities at work in Lassen Volcanic. Shield cones develop when basaltic lava flows and then hardens into a shape that resembles ...