BREAKING NEWS

Haiti earthquake was unleashed by newly found fault line

By ASSOCIATED PRESS

AUGUST 14, 2010 07:58

INDIANAPOLIS — The devastating earthquake that rocked Haiti in January was unleashed by a previously undetected fault line — not the well-known one initially blamed, according to an analysis of new data.

It's unclear how dangerous the new, unmapped fault might be or how it's discovery changes the overall earthquake hazard risk for Haiti, said Eric Calais, a professor of geophysics at Purdue University in West Lafayette, Indiana, who presented the findings this week at a scientific conference in Brazil.

He said the analysis shows that most, if not all, of the geologic movement that caused January's magnitude-7.0 earthquake occurred along the newly uncovered fault, not the well-documented Enriquillo fault.

He said that suggests Haiti's seismic zone is far more complex than scientists had anticipated. But the new fault's profile, including the possibility that it merges with the Enriquillo fault at some depth, won't be known until scientists intensively study the region.

"If there are other faults capable of producing earthquakes besides the Enriquillo and this new one we need to know about them. We need to go after them," he said from Brazil by telephone.

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