4.5 aftershock felt in Christchurch

9:42 am on 23 September 2010

A magnitude 4.5 aftershock was felt in Christchurch on Thursday morning.

GNS Science says it was centred about 10km west of the city, at a depth of between 13 - 15km, just after 6.20am.

GNS says the aftershock was widely felt across the city: within half an hour 80 people had recorded their experience of it on the GeoNet website.

Almost 900 people had registered by 9am, which GNS says is an unusually high number.