Black Butte erupted four times since it began as a large crater at the base of Mt. Shasta, approximately 10,700 years ago. Each time, it forced lava the "consistency of cookie dough" above the crater.

Some areas farther north could see a foot of snow. In Siskiyou County, Dunsmuir and Mount Shasta will receive up to 6 inches of snow by Friday. Drivers should expect chain controls and traffic ...

and Crater Lake. Mount Shasta and Three Sisters did not display similar patterns, but that may have been due to a lack of seismic measurements. Magma reservoirs are made of porous rock that liquid ...