22nd International Symposium on Vulconaspeleology

The 22nd International Symposium on Vulcanospeleology (ISV22) will be held in the Canary Islands in November 2026. The core symposium program (presentation sessions, welcome reception, symposium dinner and two
days of excursions) will take place on the island of Tenerife. These activities will be preceded by an optional field trip on Lanzarote island.

As many as 285 volcanic caves (pyroducts longer than 50 m and pits deeper than 10 m) have been registered, most of them pyroducts but also some important deep pits (emptied chimneys or shrinkage cracks) and a few drained dykes. At least three of them have more than 7,000 metres of development: Cueva del Viento from Tenerife, Cueva de la Corona from Lanzarote and Cueva de Don Justo from El Hierro.

All information can be found in the 2nd Circular of the 22nd ISV 2026.

Addition al informatio can als be found in the Newsletter of the Commission on Volcanic Caves of the UIS, no. 86, April 2026.