The tsunami threat caused by Friday morning's quake off the East Cape of the North Island is now over, Civil Defence says.
The 7.1 shake struck at 4:37am, 130 km from Te Araroa . It was followed by more than 50 aftershocks, measuring up to 5.8.
They're expected to continue through the day.
A potential tsunami warning was in place for much of the eastern and northern coasts of the North Island, but Civil Defence says "based on all available data, the greatest tsunami activity has now passed".
"However, coasts may still experience unusual, strong currents and sea level fluctuations lasting for several more hours."
The first tsunami wave arrived on the East Cape at about 6am, measuring 30cm high. Civil Defence director Sarah Stuart-Black told Paul Henry despite the low height, tsunami waves are different to normal sea currents and shouldn't be underestimated.
"The important thing is people stay away from the water," director Sarah Stuart-Black told Paul Henry.
"They should be going inland or up hills if they're close to that coastline. We understand there have been a number of self-evacuations… we're just urging extreme caution."
She says the situation is fast-changing, and the threat warning will be in place for several hours.
"We don't want anybody to be putting themselves in a position where they're not safe."
The quake follows a 5.7 tremor that shook the same area yesterday. No tsunami warning was issued for that shake.
Local authorities will determine the implication of the expected wave heights for their areas and will decide on appropriate response. #EQNZ— MCDEM (@NZcivildefence) September 1, 2016
Civil Defence's advice for Friday morning:
Stay out of the water (sea, rivers and estuaries, including boating activities).
Stay off beaches and shore areas.
Do not go sightseeing.
Share this information with family, neighbours and friends.
Listen to the radio and/or TV for updates.
Follow instructions of local civil defence authorities.
No Tsunami threat to Auckland
Ministry of Civil Defence Emergency Management (MCDEM) advises there is no threat to Auckland following the tsunami threat this morning but strong currents are likely.
MCDEM also advise East Cape, Bay of Plenty and Gisborne have likely already experienced the maximum wave heights following this morning’s tsunami threat. Train services between Newmarket and Britomart are being resumed while lines are reopened by KiwiRail.
The trains between Newmarket and Britomart are back up and running again.
Auckland Civil Defence has activated its Emergency Control Centre and is monitoring the threat of tsunami waves following the 7.0 earthquake of East Cape this morning.
In line with Ministry of Civil Defence advice issued this morning, and while we are monitoring the situation, the following applies to Auckland’s EAST COAST, people should:
1. Stay out of the water (sea, rivers and estuaries, including boating activities)
2. Stay off beaches and shore areas
3. Do not go sightseeing
4. Share this information with family, neighbours and friends
5. Listen to the radio and/or TV for updates
6. Follow instructions of local civil defence authorities.
Images from Civil Defence.