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1915 Lassen Peak Eruption

The 100th anniversary of the May 22, 1915 explosive eruption of Lassen Peak was celebrated in the summer of 2015. The eruption forever altered an already dynamic landscape and led to the creation of a national park which serves as a place of discovery for curious visitors and a living laboratory for a variety of scientists. To find out more about Lassen and the 1915 eruption, visit the links listed below.