[2] Its latest significant volcanic eruption was about 31,500 years ago[3][a] and this dating required a reassessment of recent activity at the Eastern extension of the Tarawera vent alignment.

[4][5][6] The Puhipuhi Embayment extends from the eastern margin of Mount Tarawera towards Kawerau including land mostly devoted to the Tarawera Forest portion of the Kaingaroa Forest.

[4] Puhipuhi dacite is found in a small cone and lavas that were intruded in to lake sediments and are usually overlain by Mangaone Subgroup tephras and assigned about 1000 years before the Rotoiti eruption as they are overlaid by this as well.

[4] Utu ignimbrites are exposed in small outcrops within the Puhipuhi embayment.

[8] An example of probably basaltic dyke intrusion that never reached the surface, but propagated towards Mount Tarawera, was manifest as an earthquake swarm under the embayment during a recent period of volcanic unrest.