The earthquake caused electricity to be cut to about 5600 in Tararua, Manawatu and Taranaki but Powerco expected to restore services tonight.
Powerco acting network operations manager Dean Stevenson said early reports indicated the damage was relatively minor.
About 1600 properties were still without power. "Powerco has sent field staff to inspect all its substations in the affected area and also to visit sites where we have had reports of damage", he said.
PHONE SERVICE AFFECTED
Telecom was asking its mobile customers to text rather than call, if possible, following the 6.2-magnitude earthquake. Its network was "a little overloaded," the phone company tweeted.
Vodafone reported there a cell site outage in Feilding, and two other outages. It also closed its stores from Wellington to Palmerston North.
TRAINS SHUT DOWN
Tranz Metro tweeted:
-Update: Rail network closed until further notice due to earthquake. Buses are replacing trains, please expect signficant delays. 20Jan14
— Tranz Metro (@TranzMetro) January 20, 2014
The closure was a precaution to allow track inspections to take place, the rail service tweeted.
NO TSUNAMI THREAT
There was no tsunami threat, the Wellington Region Emergency Office advised.
Wellington Airport is open and flights were taking off following the earthquake.
New Zealand Transport Agency spokesman Ewart Barnsley said they were not aware of any serious damage to the State Highway network, including Highways 2 and 3 in the Wairarapa and Manawatu.
"Contractors are out checking highways but that's going to take some time," he said.
Barnsley said the agency was "pretty certain" that bridges in Wellington were ok but "there could be rockfalls further north".
"We are asking drivers to with extreme care," he said.