Volcanoes: More than 500 volcanic vents have been identified in the State of California. At least 76 of these vents have erupted, some repeatedly, during the last 10,000 years. Sooner or later, volcanoes in California will erupt again, and they could have serious impacts on your health and safety. — Miller, C. Dan, 1989, Potential Hazards from Future Volcanic Eruptions in California: USGS Bulletin 1847, 17p.
Photo USGS Mt. St. Helens, Washington
Cascade Range Volcanoes and Volcanics – Current Updates
“More than 500 volcanic vents have been identified in the State of California. At least 76 of these vents have erupted, some repeatedly, during the last 10,000 years. … Sooner or later, volcanoes in California will erupt again, and they could have serious impacts on the health and safety of the State’s citizens as well as on its economy.” Miller, C. Dan (USGS)
“California is the most geologically diverse state in the nation. We are known for our earthquakes, landslides and flood hazards. But our nearly forgotten hazard is our volcanoes,” said Dr. John Parrish, the State Geologist of California. (USGS)
USGS Photograph taken by Lyn Topinka, 1984
Mt Shasta Cam
Mount Shasta
Elevation: 14,162 feet
Location: Northern
California, USA
May 22, 1915 eruption -Photo: R.E.Stinson
Mount St. Helen’s Cam
Mount St. Helen’s
Elevation: 4,500 feet
Location: Washington State/Johnston Ridge Observatory
Active and Potentially Active Volcanoes in California
- Medicine Lake
- Mount Shasta
- Lassen Peak
- Clear Lake
- Long Valley (including Inyo, Mono, Mammoth)
- Coso Peak
Information available from: USGS Cascades Volcano Observatory