Elevation: 515 m Coordinates: Location: Tonga Type: Volcanic caldera Last eruption: 1960 Tofua Caldera, in Tonga, is the summit caldera of a steep-sided composite cone that forms Tofua Island. Pre-caldera activity is recorded by a sequence of pyroclastic deposits and lavas constituting the older cone, followed on the northern part of the island by froth lavas or welded and unwelded ignimbrite. Following caldera collapse, lavas were erupted from the northern part of the island and… (More on Tofua)