California Seismic Safety Commission
Governor Jerry Brown Anne Caballero SCSA Secretary Director of California Seismic Safety Commission, Richard McCarthy
Amber Alert Save our H2O CDPH.CA.GOV http://keepyourhomecalifornia.org/ Secretary of state – register to voteSecretary of state – register to voteAborre Nuestra AguaCalVet logo voter affairs

SEISMIC SAFETY COMMISSION 1755 Creekside Oaks Drive,
Suite 100, Sacramento,
California 95833-3637
(916) 263-5506

Email:  celli@stateseismic.com

Right Column

California Volcano Information

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.
 

Volcanic Activity

Volcanic erruption, Mt. St. Helens, Washington State
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)

 

Snow covered Mt. Shata
USGS Photograph taken by Lyn Topinka, 1984

Mt Shasta Cam   Updates every 20 min.   Web cam courtesy of MacShasta.com

Mount Shasta
Elevation: 14,162 feet
Location: Northern
California, USA
May 22, 1915 eruption -Photo: R.E.Stinson
May 22, 1915 eruption -Photo: R.E.Stinson

Mount St. Helen's Cam  Updates every 5 min. WebCam courtesy of: USDA Forest Service

Mount St. Helen's
Elevation: 4,500 feet
Location: Washington State/Johnston Ridge Observatory

Photo to the left: The May 22, 1915, explosive eruption of Lassen Peak, California, blasted rock fragments and pumice high into the air and rained fine volcanic ash as far away as Winnemucca, Nevada, 200 miles to the east. In this photograph taken from near the town of Red Bluff, 40 miles west of the volcano, the huge column of volcanic ash and gas produced by the eruption rises to a height of more than 30,000 feet. (Photograph taken by R.E. Stinson; courtesy of the National Park Service.) USGS

 

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

Research Links

Alaska Volcano Observatory AVO
Cascades Volcano Observatory CVO USGS