A serviceable seismic hazard model for New Zealand requires an earthquake catalogue with accurate and representative data about earthquake locations, depths, magnitudes and other parameters, as well as uncertainties on those data. Usable depth (and focal mechanism) data are particularly necessary in the Hikurangi and Puysegur subduction regions in order to distinguish whether earthquakes in those regions are in the upper plate, on the subduction interface or in the down-going slab, as these three regimes...