NEW ZEALAND'S TECTONIC PLATES
The southern part of New Zealand is where the Australian techtonic plate is digging down around 200 kilometres deep under the Pacific Plate, causing the Australian plate to rise. Most of the movement in the Alpine Fault is sideways, but because of the mountain region their is a small amount of upwards movement.
Kermadec Trench Ridge
The kermadec trench ridge is where the Australian and Pacific Plate meet and something's collide, causeing seismic activity wihich can lead to things like mountains and volcanoes forming.
Taupo Volcanic Zone
The Northren part of New Zealand is where the Pacific Plate is digging downwards under the Australian Plate, causing magma to erupt through volcanoes of host have created due to other plates on earth.