Photo: Lloyd Homer/ ESNZ (file)Scientists are uncovering previously unknown fault lines and signs of hidden earthquake activity across the North Island, as new research sheds light on how the ground beneath Aotearoa moves. By analysing exposed layers of soil and sediment, researchers can identify where past earthquakes have shifted the ground. In Wairarapa, high-resolution laser mapping known as LiDAR has revealed seven previously unknown faults, including several crossing the Wairarapa Valley. Scientists found a several-metre-wide disturbance zone, suggesting past earthquake movement may have occurred across multiple smaller fractures rather than a single break. Another study in the Hamilton Basin uncovered evidence of past earthquake shaking preserved in lake sediments.

Source: Otago Daily Times March 07, 2026 22:45 UTC