New Zealand has many seismic source zone and it make earthquake occurred. Then many people concerned about the impact on construction especially residence. In this study, the assessment of earthquake activity and hazard in New Zealand can help to assess the seismic hazard and reduce effect of earthquake. The main dataset are completeness earthquake catalog occupied by Incorporated Research Institutions for Seismology (IRIS). After improving the earthquake catalogue has 10,651 events. Maximum earthquake in moment magnitude (Mw) unit, recurrence interval in year and probability of occurrence are used to assess earthquake activity related to Yadav et al. (2011) equation and other method is estimate a and b value from G-R relationship (Gutenberg and Richter, 1944). Thereafter, Peak Ground Acceleration (PGA) was considered in order to assess seismic hazard by Deterministic Seismic Hazard Analysis (DSHA) and Probabilistic Seismic Hazard Analysis (PSHA). The results of maximum earthquake are between 5.5 and 8.3 Mw in 50 years. And the highest of Peak Ground Acceleration are between 0.01 and 0.45g which is necessary to evaluate risks of the area and properly adjust quality of buildings to reduce damages from earthquake, which may occur in future. And the lowest of PGA from earthquake hazard is revealed that is 0.01g.
