Semisopochnoi Volcano |John Seach


Aleutian Islands, Alaska

51.95 N, 179.62 W
summit elevation 1221 m

Semisopochnoi island is 21 km x 18 km in diameter. It is the largest of the young western Aleutian volcanic islands.
Mt Cerberus is the most active of the three cones in the caldera.

2018-22 Eruptions
Minor ash explosions began in September 2018. Low-level eruptive activity was observed in January 2022.

Semisopochnoi Volcano Eruptions

2018-22, 1987, 1873, 1830?, 1792?, 1790?, 1772?