Clear Lake, Mono–Inyo Craters and Salton Buttes Record Small Earthquakes as California Volcanoes Remain at Normal Levels in March 24 Update
CALIFORNIA — The latest weekly update released March 24, 2026 confirms that all monitored volcanoes across California remain at normal background levels of activity, even as small earthquakes were recorded at several well-known volcanic fields.
According to the update, earthquakes greater than magnitude 1 were observed over the past week at:
- Clear Lake Volcanic Field
- Mono–Inyo Craters
- Salton Buttes
Despite the seismic activity, officials emphasize that these events fall within typical background behavior and do not signal escalating volcanic unrest.
Earthquakes Within Expected Range
Small earthquakes are common in California’s volcanic regions. The Clear Lake Volcanic Field in Northern California, the Mono–Inyo Craters near the eastern Sierra, and the Salton Buttes in Southern California all sit in tectonically active zones.
Seismicity at these sites is frequently monitored, and occasional magnitude 1+ events are considered routine.
At this time:
- No deformation anomalies were reported.
- No volcanic alert levels were elevated.
- No eruption forecasts have been issued.
All systems remain classified at normal.
Why Scientists Care About “Fresh” Rocks
The weekly update also highlights ongoing scientific fieldwork, including rock sampling in volcanic terrains. Geologists emphasize that only the freshest samples are suitable for accurate laboratory analysis.
But why?
Although rocks do not “spoil,” exposure to wind, water, and chemical weathering can alter their surface composition. That weathering can mask the original mineral structure and chemical signatures that scientists use to understand volcanic processes.
Fresh, unweathered samples allow researchers to:
- Accurately measure mineral content
- Determine magma composition
- Identify eruption history
- Study heat and fluid systems underground
Field teams are often seen carefully selecting and breaking open rock surfaces to access untouched interiors — discarding pieces that show too much surface alteration.
Monitoring Continues Across the State
California hosts multiple volcanic systems, most of which are dormant but remain closely monitored.
The Clear Lake region has a long volcanic history tied to geothermal systems. The Mono–Inyo Craters represent one of the youngest volcanic chains in the state, while the Salton Buttes sit within the tectonically active Imperial Valley.
Even minor seismic activity is tracked closely to ensure any unusual patterns are identified early.
The Bottom Line
Small magnitude earthquakes were detected at Clear Lake, Mono–Inyo Craters, and Salton Buttes over the past week, but all California volcanoes remain at normal background levels of activity.
While the seismic tremors are routine, ongoing monitoring and careful rock sampling continue to help scientists better understand the state’s complex volcanic systems.
Stay with WaldronNews.com for continued coverage of geological and seismic developments across the United States.