Wellington has been rocked by a severe magnitude 6.5 earthquake this afternoon.
GNS said the quake at 2.31pm, which was only 17km deep, was centred 5km east of Seddon, which is close to the epicentre of last month's big shakes.
Reports are coming in that the quake was felt widely across the North Island, including Tauranga.
@RiseUpNZ tweeted "Did you feel that quake? Felt here in the Tauranga avenues - swaying for about 30 seconds".
@sjknz tweeted: "Lights have been swinging up here in Tauranga. Really feel for you in Wellington #EQNZ".