These are the volcanoes monitored by the California Volcano Observatory, in order of highest to lowest risk assessment. According to USGS risk assessment of the volcanoes in CalVO's region, the following volcanoes were ranked "very high threat potential". •
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": Other volcanoes in the region have not been assessed at one of these risk levels that warrant monitoring. Volcanoes which have not erupted during the
Holocene were not included. USGS noted that though less probable it is still possible for volcanoes to erupt on longer intervals than that. map of the Mono Basin area, showing the
Long Valley Caldera (
click on to see detail). ==See also==