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.
It measured 3.2 in magnitude and was centred 15km east of Seddon and was 10km deep.