by mid_nite_poet » 03 May 06, 4:18 pm
Major quake rocks South Pacific
May 4, 2006 - 6:15AM
A massive earthquake measuring 7.8 on the Richter scale was recorded in the South Pacific, off the coast of Tonga, this morning (0127 AEST).
New Zealand's Institute of Geological and Nuclear Sciences (GNS) said the quake was centred 170km north-east of Nukualofa, at a depth of 38km beneath the surface. Other agencies reported it was as shallow as 16km.
It was felt in Auckland 3,700km away.
Tongan officials said they were checking outer islands in the group, particularly the low-lying Hapai Islands, which were near the epicentre.
The Pacific Tsunami Warning Centre issued a tsunami alert for Fiji and New Zealand after tide gauges in Pago Pago, Samoa and Niue showed a small rise in sea levels, but this was subsequently withdrawn.
People ran into the streets of Tonga's capital Nuku'alofa as buildings shook during the quake which lasted about four minutes, a police officer told Radio New Zealand.
Early reports said there had been some minor damage but no reports of injury.
Some people fled their homes in Gisborne, on the east coast of New Zealand's North Island, where Civil Defence workers went on standby after a tsunami was reported likely to hit at 6.20am local time (0420 AEST).
But the warning was lifted shortly before then, at 6am, and Radio New Zealand repeatedly broadcast announcements the scare was over.
The quake was originally estimated to be of 8.1 magnitude, a size GNS said the world experienced only once a year on average.
It was subsequently downgraded to 7.8, making it one of about 18 quakes ranging from 7-7.9 recorded annually.
A police officer in Tonga told Sky Television it was the largest tremor for over 20 years, while a resident in Tonga said he felt tremors lasting over 30 seconds.
Paula Chipman, a tourist from Seattle on holiday in Tonga, said she felt the ground shake but that no warnings were issued in the hotel where she was staying.
"There's stuff on the floor, stuff upstairs that has come out of the rooms...(but) everything looks pretty much intact," she told CNN.
Chipman said power was out in the hotel.
Fiji radio in the capital Suva said there were no initial reports of a tsunami.
"There have been no reports of any problems, but it is early in the morning," a reporter for Fiji's FM96 radio station said.
A policeman in the Samoan capital Apia, said: "Nothing has been reported in Apia so far. Everything is normal now."
A warning was also issued for Hawaii in the United States but no destructive threat was seen, according to the Pacific Tsunami Centre.
A tsunami in the Indian Ocean on December 26, 2004, killed more than 220,000 people in the region. An early warning system developed after the disaster, which includes new seismic sensors in the Pacific and Indian oceans, is still in the process of being implemented to help alert people to the possibility of a tsunami developing.
Authorities expect the system to be fully implemented by 2008.
No tsunami warnings or watches were issued for the United States as a result of the earthquake, the West Coast and Alaska Tsunami Warning Centre said.
Geoscience Australia said shallow earthquakes of this size could be very destructive and could cause serious damage up to 500km from the epicentre.
Duty seismologist David Jepson said the tsunami warning was cancelled on the grounds that Pacific tide gauges indicated the tide surge was small and there were no visual reports of impact or damage caused by a tsunami.
Silence and smile are two powerful words. Smile is the way to solve many problems and Silence is the way to avoid many problems