USGS Newsroom

MENLO PARK, Calif. — Lassen Peak, the southernmost active volcano in the Cascade Range, erupted explosively in 1915 devastating nearby areas and sending volcanic ash as far away as 200 miles to the east.  A recently released U.S. Geological Survey map showing the Lassen Volcanic Center and associated volcanic fields in unprecedented detail is enabling scientists to develop derivative products to evaluate and assess regional volcanic hazards.  On Jan. 26, USGS scientist emeritus Patrick Muffler will present a public lecture in Menlo Park, CA, "Lassen Volcanic National Park -- a wonderland of volcanoes and thermal features", discussing how scientists study the volcanic and geothermal features of Lassen National Park and are working closely with the National Park Service to provide the public with current information about this volcanic region.