Residents in New Zealand's capital have been reminded that large aftershocks are still a threat a week following a major earthquake, with a 5.4 magnitude tremor shaking the city overnight.

The earthquake, which GeoNet classified as severe intensity, hit 20km east of Seddon at a depth of 12km at about 1.07am on Monday (2307 AEST Sunday).

More than 1500 people said they felt the shake on the GeoNet's website, with 32 registering it as strong and the majority of the rest labelling it light.

It's one of the largest aftershocks to hit the region since a 6.5 magnitude earthquake hit the Cook Strait on July 21, damaging about 30 Wellington buildings.

About 25 people reported minor injuries following the tremor.

Work is continuing around the city to tidy up the remaining earthquake related problems, with the Wellington City Council hoping to have a lift shaft at James Smith carpark building fixed on Monday.

On Sunday, St Mary of the Angels Catholic church was closed to undergo strengthening work, with the Wellington Town Hall due to follow in November.

The Old Public Trust Building's future is also uncertain with structural engineers assessing the feasibility of repairing it.

Staff have been forced to relocate from the building.

EQC has received more than 2000 claims since July 21, with 75 per cent coming from the North Island and 25 per cent from the South Island.