California Volcanoes
Current volcanic activity and alert levels for California, from the USGS Volcano Hazards Program.
Current volcanoes in California (0)
There are no active volcano warnings for California right now.
No active items in this snapshot
That is normal. Conditions can change, so check official local guidance when weather is developing.
No active items in this snapshot
That is normal. Conditions can change, so check official local guidance when weather is developing.
California map
Frequently asked questions
- What do the volcano alert levels mean?
- Normal means background activity, Advisory means elevated unrest, Watch means escalating unrest with increased potential for eruption, and Warning means a hazardous eruption is imminent or underway.
About volcanoes in California
Most volcanoes sit at their normal background level most of the time. The USGS alert level (Normal, Advisory, Watch, Warning) reflects current unrest, not the long-term hazard of living near a volcano.
An elevated alert level does not mean an eruption is certain. It means monitoring has detected activity above background and scientists are watching more closely.
Be prepared
Get alerts for California volcanoes
Choose the places and hazards you care about. We’ll keep the signal clear and the frequency under your control.
Set up alerts