Christchurch has been shaken by a magnitude 4 aftershock today.
The quake struck at 11.07pm and was centred 10km southwest of Christchurch at a depth of 12km.
Social media users described the shake as "sneaky", "agressive" and "a cheeky little number".
There were no reports of damage or injury.
A 3.0 was in the same location 59 minutes later