Will Mount Shasta Erupt Again?

USGS scientists are currently working on this question. Mount Shasta doesn't erupt on a regular timescale. Research indicates that the volcano erupts episodically with ten or more eruptions occurring in short (500-2,000 year) time periods separated by long intervals (3,000-5,000 years) with few or no eruptions.

How likely is Mount Shasta eruption?

Research suggests that Mount Shasta may have erupted about every 800 years over the last 10,000 years, which corresponds to a 3.5 percent chance of eruption within the next 30 years.

When was the last time Mount Shasta exploded?

The last confirmed eruption of Mt Shasta happened in 1786 and was observed by the exporer La Pérouse from his ship.