News

California is well-known for its frequent earthquakes, but less so for its volcanic history – despite the fact that the most recent eruption in the...

New research on the ages of the most recent lava flows at Eagle Lake Volcanic Field, California suggest they are much older than once thought...

Two new journal articles about California Volcanoes in the eastern part of the state, the Long Valley Caldera and Ubehebe Craters, are headed to press...

This month, our Volcano Watch articles are exploring U.S. Geological Survey (USGS) volcano observatories and their connections to Hawai‘i. This week...

Three jolting earthquakes occurred in the wee hours this morning near Hawthorne NV, with two M5.7 events and a M5.5 occurring between the hours of 12...

A short-lived earthquake swarm occurred overnight under the Long Valley Caldera in eastern California about 4 km (2.5 mi) ESE of the town of Mammoths...

Fifteen CalVO scientists will present work this week at the 2016 American Geophysical Union Fall Meeting, held in San Francisco, California.

Volcanologists from volcano observatories around the world met at the international Volcano Observatory Best Practices Workshop in Vancouver...

An earthquake swarm started on 26 Sep 2016, 04:03AM PDT, and is ongoing in the Brawley Seismic Zone near the southern terminus of the San Andreas...

A picture is worth a thousand words—USGS Post Doctoral Fellow Jared Peacock's new 3D geophysical model for the Long Valley Caldera and Mammoth...