Global Volcanism Program | Image GVP-02540
A 7 June 1792, sketch from the east shows Semisopochnoi Island with three "smoking" volcanic cones. The 20-km-wide Semisopochnoi volcano is truncated by an 8-km-wide caldera. Three post-caldera cones, Cerebus, Lakeshore Cone, and Sugarloaf may have had eruptions in historical time. It is not certain whether the "smoke" plumes seen in this somewhat stylized sketch depict an ash eruption, or merely increased steaming.
From the collection of Maurice and Katia Krafft.
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