4.0 aftershock hits Christchurch

Two magnitude-4.0 aftershocks have been felt in Christchurch.

The latest tremor struck at 6.27pm, 10 km south-west of Christchurch, reported GeoNet.

On Twitter, funsizepolly called it "unnecessarily long", while chiefie said: "That was a good big jolt!"

User jhartevelt said it was the only noticeable aftershock of the day.

Earlier, another earthquake struck 20 km south-west of Christchurch at 5.24pm with a focal depth of 15km.

Don Chittock from Environment Canterbury said the aftershock was "nothing too significant".

"I'm on the second floor of a building and it just swayed a bit," Mr Chittock said.

He said the tremor did not cause any damage in his building.

- NZ Herald staff