A somma volcano (also known simply as a somma) is a volcanic caldera that has been partially filled by a new central cone. The name comes from Mount Somma (Italian Monte Somma), a stratovolcano in southern Italy with a summit caldera in which the cone of Mount Vesuvius has grown.

A number of the world's best examples of somma volcanoes are found on Russia's Kamchatka Peninsula and the Kuril Islands that stretch south from Kamchatka to Hokkaidō (Japan).

Some examples of somma volcanoes are the following:

• Aira Caldera, (Kyūshū, Japan)
• Ebeko, (Paramushir Island, Kuril Islands, Russia)
• Kolokol Group: Kolokol, Berg, Borzov, Trezubetz (Urup Island, Kuril Islands, Russia)
• Medvezhia (Iturup Island, Kuril Islands, Russia)
• Milne (Simushir Island, Kuril Islands, Russia)
• Teide, Tenerife Island, (Canary Islands, Spain)
• Tyatya, (Kunashir Island, Kuril Islands, Russia)
• Urataman, (Simushir Island, Kuril Islands, Russia)
• Vesuvius, (Italy)
• Zarechny, (Kamchatka Peninsula, Russia)

References

• Volcanoes of the World, at Smithsonian Institution Global Volcanism Program