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News related to Lassen Volcanic Center.

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A brief history of the Lassen Volcano Observatory (1926-1935)

Before there was a California Volcano Observatory or even a Long Valley Observatory, a tiny cabin in northern California housed the first full-time...

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Recent large earthquakes near Lassen are just another day in the Basin and Range

Since May 11, 2023, a series of M5+ earthquakes and aftershocks have rattled the area around Lake Almanor, a reservoir about 20 miles (32 km)...

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Altered states (of volcanic rock)

How does hot water bring down volcanic slopes?

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Unpacking CalVO's new seismic monitoring boxes

If you've noticed any changes to the earthquake counts released in CalVO's weekly updates, don't worry - some behind-the-scenes improvements to our...

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Which U.S. volcanoes pose a threat?

USGS Volcanic Threat Assessment updates the 2005 rankings.

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Geologic maps lay the foundation for this virtual tour of western states volcanoes.

Take a virtual geologic tour in the USGS Geonarrative, Volcanic Landscapes.

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Field-trip guide for Lassen Volcanic Center published

USGS geologists Patrick Muffler and Michael Clynne published a new geologic field-trip guide for areas in and around Lassen Volcanic National Park in...

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Lassen Peak Eruption 100th Anniversary - May, 2015

2015 marks the centennial of the May 22, 1915 explosive eruption of Lassen Peak.

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