The Hatepe eruption in 232 / -12 AD was the latest major eruption at Lake Taupo in New Zealand 's Taupo Volcanic Zone . There was minor initial phreatomagmatic activity followed by the dry venting of 6 km3 of rhyolite forming the Hatepe Plinian Pumice . The vent was then infiltrated by large amounts of water causing the phreatomagmatic eruption that deposited the 2.5 km3 Hatepe Ash . The water eventually stopped the eruption though large amounts of water were still erupted from the vent . The eruption resumed with phreatomagmatic activity that deposited the Rotongaio Ash
Hatepe eruption
Hatepe eruption
Phreatomagmatic eruption