5.1 earthquake hits Christchurch
Last updated 22:11 20/03/2011
LATEST: A 5.1 magnitude aftershock rocked Christchurch at around 9.47pm this evening, sending residents scurrying for doorways and huddling under tables.
It was the biggest aftershock since the February 22 earthquake that destroyed much of the city.
Police reported no damage from the shake, which hit 10km east of Christchurch at a depth of 10km.
A magnitude 3 quake struck only four minutes earlier at 5kms deep and 10km west of Lyttelton.
Inspector John Doherty said police had received no earthquake-related calls.