WELLINGTON, New Zealand (AP) — A powerful earthquake struck New Zealand's South Island early Monday, killing at least two people, causing damage to buildings and infrastructure, and prompting emergency services to warn people along the coast to move to higher ground to avoid tsunami waves.
The magnitude-7.8 earthquake struck just after midnight in a mostly rural area that's dotted with small towns. Near the epicenter, it opened up snaking fissures in roads and triggered landslides.
It caused damage in Wellington, the capital, more than 200 kilometers (120 miles) to the north and was also strongly felt in the city of Christchurch to the south. Residents said the shaking went on for about three minutes, and was followed by a number of strong aftershocks.
Speaking about six hours after the quake struck, Prime Minister John Key said he was unable to give further information on the fatalities until authorities had confirmed all the details. He said officials had no reason to believe the death toll would rise.
"On the very best information we have at the moment, we think it's only likely to be two. But of course there are isolated parts of the country which we don't have perfect eyes on, so we can't be 100 percent sure," he said.
Key said that crews would better be able to assess the damage during the day. He said officials had decided not to declare a national emergency because the nation's regions were able to adequately cope with the situation.
He said waves of about 2 meters (6.6 feet) had hit the coast but the tsunami threat had since been downgraded to coastal warnings.
The quake temporarily knocked out New Zealand's emergency call number, 111, police reported. In Wellington, it collapsed a ferry loading ramp, broke windows and caused items to fall from shelves. It also forced hundreds of tourists onto the streets as hotels were evacuated.
Authorities in Wellington were urging people who work in the center of the city to stay home on Monday. City officials said that some large buildings were showing signs of structural stress, and the quake would likely have caused a mess in some buildings. The city's suburban rail network was shut while crews checked tracks, bridges and tunnels.
The quake brought back memories of the magnitude-6.3 earthquake that struck Christchurch in 2011, destroying much of the downtown area and killing 185 people. That quake was one of New Zealand's worst disasters, causing an estimated $25 billion in damage.
Although Monday's quake was stronger, its epicenter was much farther from any major urban areas. Location, depth and other factors beyond magnitude all contribute to the destructive power of an earthquake.
New Zealand's Ministry of Civil Defence and Emergency Management reported that a tsunami wave struck at about 1:50 a.m. and warned residents living in low-lying areas anywhere along the country's east coast to move to higher ground.
The Hawaii-based Pacific Tsunami Warning Center said it did not expect the quake to generate a destructive Pacific-wide tsunami.
Within New Zealand, there was confusion about the tsunami threat throughout the morning.
The ministry initially said there was no threat but later wrote on Twitter "situation has changed - tsunami is possible" before reporting that a tsunami had hit.
When the quake hit, Hannah Gin had just sat down in her living room to watch a replay of the national rugby team's weekend match against Italy when her house started shaking. Upstairs, her mother let out a scream.
Gin, a 24-year-old lifelong Christchurch resident, is accustomed to quakes, so she said she sat calmly and waited, figuring the rumbling would stop in a few seconds. Instead, she said by telephone, the shaking just went on and on — for at least three minutes, according to the clock on her phone.
The quake was far less violent than the one that struck Christchurch in 2011, Gin said, adding that there was no jarring up and down or side to side, just a long, rolling sensation. But it went on for much longer than the typical quakes that strike the area, she said. She was less concerned about running for cover than she was about vomiting from the motion sickness, she said with a chuckle.
"I could hear the sliding door sliding back and forth, and we've got washing hanging up and I could see the washing moving," Gin said. "It just kept going and going."
She said that her house, which was damaged in the 2011 quake, did not appear to have sustained any new damage from Monday's quake. She also said she had heard from many of her friends who live in the city, and all were safe.
"As far as I know, everyone's fine," she said. "We're all just really shaken."
In Wellington, 214 kilometers (132 miles) north of the quake's epicenter, power was knocked out in some places, and some windows were smashed and some chimneys collapsed.
The quake was centered 93 kilometers (57 miles) northeast of Christchurch, according to the U.S. Geological Survey.
The USGS initially estimated that the earthquake had a magnitude of 7.4 before revising it to 7.8. It said the quake struck at a depth of 23 kilometers (14 miles), after initially putting the depth at 10 kilometers (6 miles). Earthquakes tend to be more strongly felt on the surface when they are shallow.
New Zealand, with a population of 4.7 million, sits on the "Ring of Fire," an arc of seismic faults around the Pacific Ocean where earthquakes are common.
Associated Press writer Kristen Gelineau in Sydney contributed to this report.
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