The 2010 earthquake in Haiti was one of the greatest seismic tragedies of the last few decades. The magnitude 7 struck late in the afternoon with an epicentre just west the capital Port-au-Prince on 12th January 2010.
The earthquake caused major damage in the capital and surrounding regions leaving a death toll estimated between 100,000 and 316,000. Most of these deaths occurred due to the collapse of buildings and other infrastructure.
TED Fellow Peter Haas explains why Haiti was not a natural disaster but a disaster of engineering in his TED talk, linked below.