What caused the quake
The 7.0-magnitude earthquake that rocked Haiti on Tuesday occurred along a strike-slip fault, the same type as California's San Andreas fault. Pressure had probably been building for centuries.
SOURCE: U.S. Geological Survey; Tim Dixon, University of Miami professor of geology and geophysics; research seismologist Gavin Hayes of USGS/NEIC | The Washington Post - January 14, 2010
More on washingtonpost.com
More World News
© 2010 The Washington Post Company