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6.7-magnitude quake strikes Papua New Guinea: USGS
by Staff Writers
Sydney (AFP) March 22, 2012

A 6.7-magnitude earthquake struck Papua New Guinea Thursday, the US Geological Survey reported, but seismologists said while it was widely felt it was too deep to cause much damage.

The quake hit some 62 kilometres (39 miles) from the Eastern Highlands provincial capital Goroka and 324 kilometres from the national capital Port Moresby at a depth of 105 kilometres.

"At over 100 kilometres deep it would not have caused any damage. No big dramas," said GeoScience duty seismologist Dan Jack.

"It was felt in Port Moresby, but just a rumble."

Chris McKee, assistant director at the Port Moresby Geophysical Observatory told AFP it was felt widely, but also said it was too deep to be of concern.

"It was felt over quite a large area of PNG but because it was deep so we wouldn't expect all that much damage," he said.

Quakes of such magnitude are common in impoverished Papua New Guinea, which sits on the so-called "Pacific Ring of Fire", a hotspot for seismic activity due to friction between tectonic plates.

Last week, a 6.4-magnitude earthquake struck the New Britain region of the country, with no damage or injuries reported.

"Commonly the structures in PNG don't seem to break up as you see in other places such as parts of Southern Europe and the Middle East, they tend to be able to absorb the shaking and not break. It's a diferent construction style," said McKee.

"In the Middle East it's made with mud bricks or masonery which are not very tolerant of shaking, whereas here it is timber which can move around more."

A giant tsunami in 1998, caused by an undersea earthquake, killed more than 2,000 people near Aitape, on the country's northwest coast.

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More than 40 aftershocks after big Mexico quake
Mexico City (AFP) March 21, 2012 - More than 40 aftershocks shook the Mexican capital and southern areas after a long and powerful 7.4-magnitude earthquake left 11 hurt and damaged dozens of buildings, officials said Wednesday.

Aftershocks of up to 5.0-magnitude continued some 12 hours after the quake, which occurred just after midday Tuesday with its epicenter south of the Pacific resort of Acapulco, according to the National Seismological Service.

Experts surveyed cracks in walls and roads and twisted train lines in central and southern areas and the sprawling capital Wednesday.

"The urban infrastructure of the city perfectly supported the quake," said Elias Moreno Brizuela, director of the city's civil protection services, on W Radio.

"Up to now we've seen no structural damage."

The quake was one of the strongest to shake the capital since 1985, when an 8.1-magnitude temblor left between 6,000 and 30,000 dead, according to officials and rescue organizations respectively.

Guerrero state governor Angel Aguirre said that some 1,600 houses in four municipalities of the coastal region known as the Costa Chica, in Guerrero and Oaxaca states, had been damaged in the quake.


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Poweeful quake in Mexico, 11 injured
Mexico City (AFP) March 21, 2012
A powerful 7.4-magnitude earthquake struck southwest Mexico, ijnjuring 11 people, damaging hundreds of homes and sending panicked residents out onto the streets of the capital. The quake struck on Tuesday south of the Pacific resort of Acapulco, between the states of Guerrero and Oaxaca, and was followed by several aftershocks, the US Geological Survey said. Initially it had estimated the ma ... read more

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