 Other volcanoes in the Southern Volcanic Zone have similar alignments, such as Nevados de Chillán and Puyehue-Cordon Caulle.In comparison to Villarrica, Quetrupillán has been less active and its eruptions were also smaller than Villarrica's, with no large pyroclastic flows found at Quetrupillán.Quetrupillán is a high composite stratovolcano with a wide caldera and a shrinking glacier cover.