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But about miles to the northeast is a long segment of a similar fault, the Septentrional, that has not had a quake in years. Par Michel CorbeilLe Soleil. Those buildings still standing will need to be tested for safety. Construction de la Tour Pearl River. On the island of Hispaniola, which comprises the Dominican Republic and Haiti, the Caribbean-North American boundary stresses are expressed in numerous strike-slip faults, including the Enriquillo and Septentrional, which are relatively long and roughly parallel.

Earthquakes and landslides along the Puerto Rico Trench, an undersea fault zone, have the potential to cause tsunamis. Prentice, a geologist with the geological survey in Menlo Park. Indeed, two-thirds of the buildings in Port-au-Prince were unsafe before the Jan. On Wednesday, the area experienced a strong aftershock that was initially rated at 6.

Follow her on Twitter. La taille du fichier pdf est de 58 Meg. Countless other homes, stores, office buildings and more churches have been reduced to rubble.

But the intensity and frequency of those aftershocks have followed the patterns of other earthquakes, he said. Wikipedia Commons12 mars Of the 22 structures surveyed: The New York Times To scientists who study seismic hazards in the Caribbean, there was no surprise in the magnitude 7 earthquake that devastated the Haitian capital, Port-au-Prince, two weeks ago. Mais ils nous disaient, c’est pire chez eux! By finding higher sediments that are unruptured, the dates of quakes can be determined.


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The fault that ruptured violently on Jan. Il y a aussi de bons ouvrages. Et je fais mienne cette affirmation de Jean Rostand: Calais and others had warned in that a quake could occur along that segment, part of what is called the Enriquillo-Plantain Garden fault zone, although they could not predict when.

Last Thursday, the geological survey issued a statement estimating that there was a 3 percent likelihood of a 7 magnitude aftershock in the next 30 days, and a 25 percent chance of one of magnitude 6. A second MOE building near the waterfront appeared intact was unable to gain access. Researchers have relied on a network of 35 benchmarks to measure fault movement.

Prentice and others have done basic research on a segment in the Dominican Republic. The State Department has yet to reach out.

Production TPE Construction para-sismique des bâtiments en béton armé

Although the results are preliminary, the work shows that stresses have increased just west of the segment and just east, within three miles of Port-au-Prince. There are already signs that the Haitian quake has prompted concern elsewhere in the region, at least among the general population. Of some concern, researchers said, was that none of the aftershocks have occurred in the area of increased stress nearer to Port-au-Prince, where ordinarily some might have been expected.

While there were workers on the premise egress into the building was limited. Peterson, of Global Green, would like to see an effort at reforestation accompany the new city blueprint.


Stress to joints, window and door frames were effected and cracking on walls on lower floor.

Such sequences have been observed on other faults, including the North Anatolian in Turkey. Except, perhaps, in where on the island of Hispaniola it occurred.

Debris will need to be cleared before new structures can take their place. Along the boundaries, the relative eastward movement of the Caribbean plate, at the rate of less than an inch a year, creates strike-slip faults, shallow fissures whose sides slide in relation to one another in an earthquake.

Davis believes urban planners must focus on social factors as well. There are several outer buildings that seemed to have suffered minor damages, with one new building under construction pictured that appeared intact. Major institutions—the national cathedral, the presidential palace—lie toppled.

Production TPE Construction para-sismique des bâtiments en béton armé

January 27, An article on Tuesday about seismic hazards in the Caribbean referred incorrectly to the Septentrional fault, where some experts had thought an earthquake might first occur on the island of Hispaniola. Habitat for Humanity will soon be on the ground, and Earthspark, a company promoting solar power in developing countries, plans to send over 50, solar lamps, mobile chargers, and flashlights to help in the rescue effort and lay tracks for a renewable energy revolution in Haiti.

All those things have put the whole country on edge. Note from the author.