On 12 January 2010, Haiti experienced a 7.0-magnitude earthquake centered 10 miles west-southwest of Port-au-Prince. United Nations estimates indicate that more than 222,000 people were killed, 300,000 injured, and 2.3 million displaced by the earthquake and its 59 aftershocks. At dawn on 13 January, under the direction of United States Southern Command, elements of the Department of Defense arrived to support the Government of Haiti and the US Embassy. The command established Headquarters Joint Task Force-Haiti, with the mission of carrying out humanitarian assistance and disaster-relief operations in support of the United States Agency for International Development, the principal federal agency for the US effort.