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National Tsunami Hazard Model - 2013

This map shows the expected maximum tsunami heights in metres at the 2500 year return period, and 50th percentile of confidence, for 20km sections of the New Zealand coastline

This map shows the expected maximum tsunami heights in metres at the 2500 year return period, and 50th percentile of confidence, for 20km sections of the New Zealand coastline

This is the latest (2013) version of the National Tsunami Hazard Model (NTHM), and the first to cover all coasts of New Zealand. It provides estimates of the maximum tsunami height at the coast to be expected within specified time periods and confidence levels. This model has been used as a basis for defining tsunami evacuation zones for several regions of the country, and for estimates of the tsunami risk posed to people and buildings.

The model is described in Chapter 6 of the 2013 Tsunami Hazard Report.

Key results from this report are available in the form of GIS Shapefiles. Use of this data requires acceptance of the disclaimer in the ‘Use limitations’ section of the included Metadata pdf.

More detailed results for individual 20km sections of coast, including hazard curves and deaggregation plots, can be found in the report 2013 All-Coast Tsunami Hazard Data.

GIS Shapefiles updated: 25 October 2016: Addition of 1000 year return period data, and correction of minor typos.