Active faults are common features of the New Zealand landscape
Many of us have experienced an earthquake – they are a common occurrence in New Zealand. Active fault lines which generate earthquakes and can rupture the ground, potentially pose a significant hazard to homeowners, communities and infrastructure.
The Earthquake Commission Act automatically gives NZ homeowners some cover (EQCover) if you have private insurance when a natural disaster strikes. However, lending institutions and insurance companies are becoming increasingly particular about lending and or insuring homeowners residing upon, or immediately adjacent to, a known active fault. Where is your land situated?
What fault line mapping can do for you …
We have the experience and capability to delineate fault structures. Key evidence enabling us to recognise active faults (or folds) is the vertical and/or lateral offset (or buckling) of landforms or young geological deposits visible from ground and/or aerial survey.
Land use and hazard mitigation
While displaced landforms can provide important clues as to the general location of active faults or folds, many details relevant to land-use, development and hazard mitigation cannot be obtained without more detailed site-specific investigation.
With accurate on-the-ground fault mapping, the excavation of a trench across the mapped structure can be dug to reveal the zone of deformation. By detailing sub-surface structures exposed along the trench walls, it is possible to ascertain the timing and frequency of rupture events.