The middle of the country continues to shake as two earthquakes rattled the area overnight.
The first, a magnitude-5 quake, hit at 12.04am, GNS Science said.
It was centred 35km north east of Seddon and was 19km deep.
Shortly after that tremor, another smaller quake hit at 12.11am.
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It measured 3.2 in magnitude and was centred 15km east of Seddon and was 10km deep.