On January 12, 2010, in the afternoon of a Tuesday, Haiti was struck by a magnitude-7.0 earthquake. This was the worst earthquake to hit the country in the past 200 years. The quake's epicenter was just outside the Haitian capital of Port-au-Prince. The quake caused major damage to Port-au-Prince and nearby areas. Over 200,000 people were thought to have been killed, but it was hard to be sure because many people were buried in mass graves before they could be identified.