The earthquake was at a depth of 12km and was centred 10km east of Seddon

The earthquake was at a depth of 12km and was centred 10km east of Seddon
New Zealand has been struck with another large magnitude 5.5 earthquake.

Just three weeks after the mammoth earthquake that shook central New Zealand, an earthquake has rocked South Island and lower North Island of New Zealand but fortunately hasn't done any damage.

It was at a depth of 12km and was centred 10km east of Seddon.

Marlborough District Council mayor John Leggett told AAP he was at a Christmas parade when the quake occurred.

'We were down on the foreshore and we definitely felt it. It was pretty significant,' he said.

Wellington City Council spokesman Richard McLean said, 'emergency controllers have been talking to each other' but there are no reports of damage in the capital.

GNS Science duty seismologist Bill Fry told AAP the quake was part of a sequence of aftershocks following the 7.8 quake on November 14.

'It's in a location that we've seen a lot of other earthquakes. It was quite large,' he said.

He said at the epicentre of the quake the ground shaking would have been severe.

Close to 7,000 people, mostly in the upper South Island and throughout the lower North Island, registered with GeoNet that they felt the quake.

It also triggered a relatively moderate quake in the Hawke's Bay region at about the same time, Mr Fry said.

The Hawke's Bay quake, centred 25km south of Hastings, was initially recorded as a 4.8 but was downgraded to a 3.

Thousands of aftershocks have been recorded since the 7.8 quake three weeks ago, which isolated the South Island coastal settlement of Kaikoura and altered the landscapes around it.

The Fire Service says there have been no damage reports yet from the aftershocks on Sunday.