A 5.7 magnitude quake struck Christchurch at 1.13pm and was felt as far north as Wellington.
• A cliff has collapsed in Sumner
• Shelves have fallen in homes, shops and libraries but so far no reports of serious injuries or damage.
• Riccarton Mall, Northlands Mall, Ballantynes and Colombo Mall have been evacuated.
• Spark is urging people to text or use data where possible to stop phone lines overloading.
• Police say at least 450 homes are without power
• Aftershocks are continuing.
Keep up with the latest updates here.