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.
Eye On The Bay: Volcano Roadtrip 1 - 7/20/11

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