The vents of Huaynaputina form a north-northwest-south-southeast trend, which also encompasses the neighbouring volcanoes Ubinas and Ticsani, the former of which is a typical stratovolcano while Ticsani resembles Huaynaputina in structure. The trend also constitutes a volcanic field located behind the major volcanic arc and associated with faults at the margin of the Río Tambo graben as well as regional strike-slip faults. In addition, the volcanic rocks produced by these volcanoes have similar compositions, and recent seismic and volcanic activity at Ubinas and Ticsani indicate that they share a magma reservoir. The faults associated with the volcanic complex have influenced the evolution of the constituent volcanoes including Huaynaputina by acting as conduits for ascending magma especially at fault intersections. A magma reservoir may underpin this volcanic system.