Sollipulli is part of the Southern Volcanic Zone of the Andes, one of the four belts of volcanoes which are found in the mountain range. The other three are the Northern Volcanic Zone, the Central Volcanic Zone (both north of the Southern Volcanic Zone) and the Austral Volcanic Zone (south of the Southern Volcanic Zone). These volcanic zones are separated by gaps where there is no volcanic activity and the subduction of the Pacific Ocean crust is shallower than in the volcanically active areas. About 60 volcanoes have erupted in historical time in the Andes, and 118 additional volcanic systems show evidence of Holocene eruptions.