USGS Volcano Notice - DOI-USGS-CALVO-2022-09-05T13:52:18-07:00

Monitored CALIFORNIA VOLCANOES
Current Volcano Alert Level: all NORMAL
Current Aviation Color Code: all GREEN

Activity Update: All volcanoes monitored by CalVO using telemetered, real-time sensor networks exhibit normal levels of background seismicity and deformation. Volcanoes monitored include Mount Shasta, Medicine Lake Volcano, Clear Lake Volcanic Field, Lassen Volcanic Center, Long Valley Volcanic Region, Coso Volcanic Field, Ubehebe Craters, and Salton Buttes.

Observations for August 29, 2022 (0000h PDT) through September 4, 2022 (2359h PDT):

Clear Lake Volcanic Field: No earthquakes at or above M1.0 were detected in the Clear Lake Volcanic Field. As is typical, moderate levels of seismicity were recorded at the Geysers geothermal steam field south of the Clear Lake Volcanic Field; 35 earthquakes at or above M1.0 were detected, with the largest measuring M2.2.
Lassen Volcanic Center: No earthquakes at or above M1.0 were detected.
Long Valley Volcanic Region: Four earthquakes at or above M1.0 were detected in the Long Valley Caldera, with the largest measuring M2.1. No earthquakes at or above M1.0 were detected at Mammoth Mountain. One earthquakes at or above M1.0 was detected at Mono-Inyo Craters, measuring M1.2. Three earthquakes measuring at or above M1.0 were detected south of the caldera in the Sierra Nevada range, with the largest measuring M2.8.
Mount Shasta: One earthquake at or above M1.0 was detected, measuring M1.0.
Medicine Lake: No earthquakes at or above M1.0 were detected.
Salton Buttes: One earthquakes at or above M1.0 was detected at Salton Buttes, measuring M1.1.
Coso Volcanic Field: Two earthquakes at or above M1.0 were detected at the Coso Volcanic Field, with the largest measuring M1.5.
Ubehebe Craters: No earthquakes at or above M1.0 were detected.