World Bulletin/News Desk
A powerful 7.6-magnitude earthquake struck off northern Chile late on Wednesday but there were no reports of damage and a precautionary tsunami alert along the coast and in neighboring Peru was called off.
It was the strongest of several aftershocks that followed a huge 8.2-magnitude quake blamed for six deaths in the same region on Tuesday.
Chile's emergency office Onemi said there were no initial reports of casualties or serious damage from the latest quake.
"I was evacuated like all the citizens and we have come here (to Arica's emergency office) to see if there is any way we can help," she said late on Wednesday night.
The area is home to many of the biggest mines in Chile, the world's top copper producer.
A spokeswoman for Glencore Xstrata's and Anglo American's Collahausi mine said the "process of normalization" it was following after Tuesday's quake was continuing without problems.
Other mines could not immediately be reached for comment, but they were generally unaffected by Tuesday's stronger quake.
The new quake was located 12 miles (19 km) south of Iquique at a relatively shallow depth of 12.4 miles (20 km), the U.S. Geological Survey said.
The Pacific Tsunami Warning Center said that while there was no widespread tsunami threat, the latest tremor could generate a local tsunami.
The bigger earthquake on Tuesday triggered a tsunami with 2-meter (7-foot) waves and officials said it caused six deaths.
More than 2,600 homes were damaged and fishing boats along the northern coast were smashed up. However, most infrastructure held up.
Bachelet, who was sworn in as president less than a month ago, is conscious of the stinging criticism she faced near the end of her first term in office in 2010, when her government was seen to have responded inadequately to a massive 8.8-magnitude quake and tsunami that killed 526 people.
Residents in the area of the latest quakes have been expecting "the big one" for many years. The Nazca and South American tectonic plates rub up against each other just off the coast of Iquique, where a "seismic gap" has been building up.
An unusually large number of tremors in the area in recent weeks had led authorities to reinforce emergency procedures, while residents bought rations and prepared for an eventual evacuation.
However, the mega-quake they had been fearing may still be yet to happen, said Paul Earle, a seismologist at the U.S. Geological Survey National Earthquake Information Center.
"(Tuesday's) earthquake was not large enough to release the stress on the whole area where they believe the seismic gap is," he said earlier on Wednesday. "It's going to take some time to evaluate the effect of this earthquake on that region. But people should stay prepared."
In Peru, the earthquake led to temporary power outages and evacuations in some southern towns, but did not cause serious damage or injuries.
Nearly eight times more energy was released in the quake that struck Chile some four years ago, experts say.
It was too early to estimate financial losses, but they were expected to be much lower than the $30 billion from the 2010 quake, which affected the more densely populated central region, said earthquake expert Alexander Allmann at reinsurer Munich Re.
"The quake has caused severe damage to some buildings in the affected region, but in general the building standards in Chile are comparatively high, allowing buildings and infrastructure to withstand such quakes reasonably well," said Allmann.
"The small tsunami triggered by the quake is not expected to have caused significant damage."
Small fishing vessels in the ports looked to be among the worst affected.
"We struggled just to be able to get a bigger boat...and now look at it," a woman from Iquique's fishing community, in tears, said in a video posted on Reuters.com.
Several smaller aftershocks, some as big as 5.2 magnitude, continued into Wednesday.
Although the tsunami alert was called off, the navy warned that high waves and strong currents could continue, and some ports in the area remained closed on Wednesday afternoon.
Landslides had also blocked eight roads and Iquique's hospital suffered some damage but otherwise most infrastructure was in good shape, emergency office Onemi said.
Nearly 300 prisoners took advantage of the emergency on Tuesday night to escape from a female penitentiary in Iquique. Some 131 had since voluntarily returned, Onemi said.
Thousands of miles away in Hawaii, residents were warned of possible sea level changes and strong currents that could pose a danger to swimmers and boaters.
THE BIG ONE
Chileans live in one of the most earthquake-prone areas of the world. In 1960, southern Chile was hit by a 9.5 quake, the largest in modern history.
Residents in the area of the latest quake have been expecting "the big one" for many years. The Nazca and South American tectonic plates rub up against each other just off the coast of Iquique, where a "seismic gap" has been building up.
An unusually large number of tremors in the area in recent weeks had led authorities to reinforce emergency procedures, while residents bought rations, and prepared for an eventual evacuation.
However, Tuesday's quake was likely not 'the big one' they had anticipated, said Paul Earle, a seismologist at the U.S. Geological Survey National Earthquake Information Center.
"This earthquake was not large enough to release the stress on the whole area where they believe the seismic gap is," he said.
"It's going to take some time to evaluate the effect of this earthquake on that region. But people should stay prepared."Last Mod: 03 Nisan 2014, 10:11