Canterbury was hit by a 4.2 magnitude aftershock on Sunday evening.
The quake struck at 7.17pm, 20 kilometres south west of Christchurch, at a depth of eight kilometres.
GNS Science says it was widely felt in the Christchurch region.
Canterbury was hit by a 4.2 magnitude aftershock on Sunday evening.
The quake struck at 7.17pm, 20 kilometres south west of Christchurch, at a depth of eight kilometres.
GNS Science says it was widely felt in the Christchurch region.