Paeroa Fault

The Paeroa Fault is a seismically active area in the Taupō District, Waikato Region of the central North Island of New Zealand.

North of Lake Taupō, volcanic ignimbrite at least 500 metres (1,600 ft) thick,[2] and called the Paeroa Ignimbrite (dated to 339 ± 5 ka)[3][4] is exposed along the very steep fault scarp of the Paeroa Fault that defines the western flank of the 979 metres (3,212 ft) high Paeroa Range.

[6] The raised block further to the east goes into the down lands associated with the Reporoa Caldera that extend to form the Taupo-Reporoa Basin.

This intra-rift fault has been estimated to have single event earthquakes in its northern portion about 6.4 Mw and for the whole fault, rupture intensity of about 6.8 Mw with up to 2.5 metres (8 ft 2 in) upward displacement.

Almost half of rupture events in the last 16,000 years have been associated with nearby volcanic eruptions so it is not only the direct earthquake impact that may be important.