Lassen

Lassen Peak Began Years Of Eruptions 100 Years Ago, Building To Massive Blasts And A National ParkIt quietly built up magma for 27,000 years before beginning years-long series of eruptions on May 30th, 1914 and today the national park around Lassen Peak remains a closely observed volcanic hot spot.

More From CBS San Francisco

Music's Biggest Night
Your Bay Area Guide To Valentine's Day

Listen Live