California Supervolcano Is Active, But Is Eruption Possible? | Weather.com

California Supervolcano Is Active, But Is Eruption Possible? | Weather.com

March 22, 2025

Updated: March 22, 2025, 12:58 am EDTPublished: March 22, 2025, 12:58 am EDT

The Long Valley Caldera has been active since 1978, but new findings shed better light on the possibility of a supereruption that last occurred there more than 700,000 years ago.

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