This trench is across the earthquake faultline at Ohariu Valley near Johnsonville.
Photos courtesy of GNS Science
This week I have been talking to earthquake scientists at GNS Science.
Nicola Litchfield is an earthquake geologist who investigates large prehistoric earthquakes in the Wellington region. She is part of a team who have dug deep trenches across earthquake faults around Wellington. Through analysis of the exposed layers and carbon dating them the dates of previous quakes can be estimated.
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