Olca-Paruma belongs to the Central Volcanic Zone (CVZ) of the Andean Volcanic Belt, a long volcanic arc that features 44active, or potentially active, volcanoes. The most active volcano is Lascar, where a major eruption took place in 1993. Other volcanoes with recorded activity include Irruputuncu, Isluga, and San Pedro. Fumarolic activity has been recorded at Alitar, Guallatiri, Lastarria, Olca-Paruma, Ollagüe, Putana, and Tacora. The volcanic activity of the CVZ ultimately is caused by the Nazca Plate subducting beneath the South American Plate.