In general, Christchurch was well-served with sound, modern, well-documented professional earth science knowledge and expertise relating to the seismic hazard it faced. However, there is room for improvement in communicating technical information to city planning authorities. There could have been a better outcome than there was. Most importantly, there is a clear need for much better geological knowledge of the substrate beneath the city (up to 20 metres below surface), and more rigorous attention to observing lawful building code requirements.
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GEOSEA 2012