via Fisher Caldera, Alaska – The largest Caldera System in the State —

Also, here is a video of someone exploring a 2017 quake at Fisher via Google Maps. It didn’t lead to any volanic activity.

• Global Volcanism Program eruption history
• More details on Fisher’s largest eruptions. The Fisher Tuff eruption almost 13,000 years ago was larger than Campi Flegrei’s Neapolitan Yellow Tuff!
• “Spectacular mobility” of pyroclastic flows around Fisher Caldera (abstract only).

Featured image: Fisher’s Turquoise Cone, by J. E. Gardner, via Alaska Volcano Observatory