NZ is well prepared for earthquakes.
Most quake prone cities are Napier, Gisborne and Wellington. Buildings are generally quake proof now (parliament too - take a tour and see) and houses are wood so safe.
Auckland is built on 40-50 old volcanoes. Another one could erupt but no one knows when. Last one erupted in the sea off the coast in 600AD and formed the beautiful Rangitoto island.
There are a few active volcanoes in NZ. All far away from cities. White Island in the Bay of Plenty, as well as Mt Ruapehu (the largest ski resort in NZ), Mt Tongariro and Mt Ngarahoe(Mt Doom in Lord of the Rings). They erupt every few years and the ski season is disrupted and perhaps a few aircraft are diverted to stay away from volcanic dust.
NZ can have tsunamis, but so can anywhere - SA included.
Whenever I hear this stuff I think people are looking for excuses not to immigrate.....The USA is prone to all the same stuff as NZ and much MORE (earthquakes, tornados, volcanoes, floods, hurricanes etc) and they do just fine coping with it. NZ will too.
Volcanoes and earthquakes that strike once in a few hundred years OR savages raping and killing every day all over the Republic???

Please make your choice.