Days after severe rainfall brought flooding to Canterbury, Christchurch has been rattled by a earthquake.
At just 3.9 magnitude, the quake was minor in strength.
However, the epicentre was just five kilometres south-west of the South Island's biggest city, at a depth of just seven kilometres below the surface.
"Boom! That was quite the shake in Christchurch, with a long rattling tail," Mike Yardley said on Twitter.
More than 10,000 people reported feeling the earthquake to monitoring agency GeoNet.
Christchurch residents also felt a shallow 4.2 jolt, epicentred in the opposite direction of the city to the north-east, on Monday night.