Magnitude 4 aftershock strikes Christchurch

A magnitude 4 aftershock has struck in Christchurch this morning, GNS Science reports.

The quake was centred within 5km of the city at a depth of 7km, striking at 8.54am.

GNS Science said the quake was "widely felt" in Christchurch, with reports of it felt strongly in Bexley, Dallington, Richmond, Saint Albans, and Woolston.

The quake followed a 3.1 magnitude aftershock 10km south-east of the city at a depth of 6km at 12.35am, a 3.3 magnitude aftershock 10 km south-east of Christchurch at a depth of 6km at 10.23pm and a 3.4 magnitude quake at 10 km south-east of Christchurch at a depth of 7 km at 9.09 pm.

- NZ Herald staff