Before revision: Mount Shasta in far-northern California, north of Redding Lassen Volcanic Center in Lassen Volcanic National Park Long Valley Caldera in eastern California These were ranked "high threat potential": Mono-Inyo Craters in eastern California Clear Lake Volcanic Field north of the San Francisco Bay Area Medicine Lake Volcano in far-northern California, northeast of Mt Shasta Salton Buttes in far-southern California, at the Salton Sea These were ranked "moderate threat potential": Mono Lake Volcanic Field in eastern California Coso Volcanic Field in eastern California Soda Lakes near Fallon, Nevada Mammoth Mountain in eastern California Ubehebe Craters in Death Valley National Park One was ranked "Low to Very Low Threat Potential": Golden Trout Creek volcanic field in Sequoia National Forest Other volcanoes in the region have not been assessed at one of these risk levels that warrant monitoring.
After revision: Mount Shasta in far-northern California, north of Redding Lassen Volcanic Center in Lassen Volcanic National Park Long Valley Caldera in eastern California These were ranked "high threat potential": Mono-Inyo Craters in eastern California Clear Lake Volcanic Field north of the San Francisco Bay Area Medicine Lake Volcano in far-northern California, northeast of Mt Shasta Salton Buttes in far-southern California, at the Salton Sea These were ranked "moderate threat potential": Mono Lake Volcanic Field in eastern California Coso Volcanic Field in eastern California Soda Lakes in northwestern Nevada near Fallon Mammoth Mountain in eastern California Ubehebe Craters in Death Valley National Park One was ranked "Low to Very Low Threat Potential": Golden Trout Creek volcanic field in Sequoia National Forest Other volcanoes in the region have not been assessed at one of these risk levels that warrant monitoring.