A strong earthquake has shaken much of the country.
The 5.8 quake was centred 30km north-west of Levin, GeoNet said, and was 37km deep. GeoNet had initially assessed the quake as 5.9.
More than 36,000 people, from the Far North to Dunedin, reported feeling the quake, which struck at at 7.53am.
Trains in the Greater Wellington region were suspended while crews inspected the full rail network.
MetLink said trains were running again mid morning but at reduced speeds.
10.30am Update: Train services are resuming from WELL but will run at reduced speed. https://t.co/KftxSdCqJU— Metlink Wellington (@metlinkwgtn) May 24, 2020
First time back on train commute, and big ka pai to @metlinkwgtn . Seating all spaced out, easy to understand physical distancing instructions on every seat and in the isles. #covid19nz #wellington pic.twitter.com/hDYqIlwRNG— Phill Sherring (@PhillSherring) May 24, 2020
First #eqnz with baby. Currently taking down all the pictures I had hung in his room. It’s been a while between shakes and although his earthquake kit is up to date, I’d forgotten why you never hang a picture over a baby’s bed!— Marianne Elliott (@zenpeacekeeper) May 24, 2020
Wellington Civil Defence said there have been no reports of damage.
It said it will be mid-afternoon before it can conclusively say nothing was damaged, but right now things are looking good.
It said the shake is a timely reminder for people to have adequate earthquake supplies.
Horowhenua District Council said there had been no call from Civil Defence to evacuate properties, and staff were out checking for damage.
There had been reports that residents on Waitārere Beach had been leaving their homes.
GeoNet said the earthquake was too small to generate a tsunami.
Prime Minister Jacinda Ardern was being interviewed on Newshub's AM Show when the quake hit.
"We're just having a bit of an earthquake," she said.
"Quite a decent shake here, if you see things moving behind me.
"The Beehive moves a little more than most.
"I'm in a structurally sound place."
Not what we need right now #eqnz— Grant Robertson (@grantrobertson1) May 24, 2020
'The whole house was moving round'
Levin local Davey Hughes said it felt like his hilltop home did a complete 360 degree turn.
"I felt the earth move, man and did it shake, I mean I've lived here 30 years and that was the biggest shake I've ever felt in Levin," he said.
"Normally they come down and there's a bit of a rumble and you hear them coming ... that one didn't rumble that one just erupted."
"All of a sudden the whole house, I'm on top of a hill and it was almost like you, I was doing a 360, the whole house was moving round."
Hughes said he wasn't hurt but just had a few broken vases to clean up around the house.
Matthew Rollinson, owner of New World supermarket in Levin, said some customers were ducking for cover, and a few jars and some fire cleaning product came toppling off the shelves, but nothing serious.
"We're fairly lucky. I mean it was a pretty big shake and it went for quite a long time. I was upstairs at the time so I came down to check on everybody. It was a bit of a wake-up call."
Jazmine Bell in Palmerston North said the quake was incredibly strong, and left plant pots, sculptures, books and paintings scattered in her garden and house.
"I actually couldn't get up, to go get under the doorway or anything. I was sitting at the table having that first cup of tea and could not move. I tried to get up and it was just - the house was shaking so much," she said.
GNS Science duty seismologist John Ristau said quakes in the area were not unusual, but often they're much weaker.
"Earthquakes in this area - offshore Kapiti Coast - are not unusual, we get quite a large number of earthquakes out there every year, including a number of [magnitude] threes and fours which are quite widely felt."
There have been smaller tremors of up to 4.4 magnitude.
Ristau said he doesn't expect significant aftershocks - just smaller shakes - nor any tsunami risk.