A shallow 4.1 magnitude earthquake has rattled Christchurch this afternoon.
The tremor, at 3.33pm, was centred 20km west of the city at a depth of 9km.
It had a Mercalli Intensity (the strength felt on the surface) of 6, GNS Science said.
It followed a magnitude 3.1 earthquake in the same area just after midnight this morning.
Residents in the area took to Twitter to share their experiences of this afternoon's shake:
Nothing like an #eqnz to remind you, you're in Christchurch...— Jane Blackmore (@JaneBlackmoreNZ) January 10, 2014
#eqnz And I thought it was just fat post Xmas me sitting down on the sofa!— greg jackson (@therealgregjack) January 10, 2014
Baby's first earthquake just then. Glad it was a tiddler. #eqnz— Moata Tamaira (@MoataTamaira) January 10, 2014