<P> During the last 10,000 years , Mount Shasta has erupted an average of every 800 years , but in the past 4,500 years the volcano has erupted an average of every 600 years . The last significant eruption on Mount Shasta may have occurred about two centuries ago . </P>
<P> During the last 10,000 years , Mount Shasta has erupted an average of every 800 years , but in the past 4,500 years the volcano has erupted an average of every 600 years . The last significant eruption on Mount Shasta may have occurred about two centuries ago . </P>
when was the last time mount shasta was active
when was the last time mount shasta was active
about two centuries ago
about two centuries ago