January 1 - At least 18 FARC rebels are killed while celebrating the New Year in an air raid by the ColombianAir Force in the south of the country.
January 3 - The volcano Galeras erupts, forcing the evacuation of 8,000 people.
January 5 - David Murcia Guzman is extradited to the United States to face charges of conspiracy and money laundering in the case of marketing company D.M.G. Group.[1]
January 28 - Colombia makes a formal diplomatic protest to Venezuela over the latter's alleged violation of Colombian airspace by a military helicopter.
January 29 - The American newspaper El Nuevo Herald reports on the discovery of a mass grave behind a local cemetery in the town of La Macarena, Meta. The grave is reported to contain close to 2,000 unidentified bodies, killed and buried there by the Colombian military as guerillas over the span of 5 years according to locals and officials.[2][3][4]
April 22 - Television personality and model Lina Marulanda dies after falling from her apartment's 6th story balcony in Bogota. Her death is ruled a suicide.
May
May 30 - The first round of voting in the 2010 Presidential Election takes place; no candidate receives a majority, triggering a second round.[7]
June
June 7 - Artist Omar Rayo dies on an ambulance ride to a hospital in Cali after a heart attack.
June 25 - A series of secret recordings emerge of conversations between former congressperson Germรกn Olano and construction company owner Miguel Nule Velilla, whose Nule Group had managed numerous public projects in Bogotรก. The recordings detail multi-million dollar public commission negotiations. These recordings spark a scandal dubbed the 'Carrusel de la Contrataciรณn' (Eng. Hiring Carousel) and will lead to numerous investigations into Bogotan public officials and businessmen.
September 22 - FARC-EP Easter Bloc commander Victor Julio Suรกrez (a.k.a. Jojoy Monkey) is killed by Colombian authorities during 'Operaciรณn Sodoma' in La Macarena, Meta.
October
October 21 - The 1stMacondo Awards is held at the Jorge Eliรฉcer Gaitรกn Theater in Bogotรก.
October 31 - Luis Andres Colmenares dies after attending a Halloween party at the Zona Rosa nightclub in Bogotรก. His death will be the focus of multiple investigations, trials, and controversies in the following years.
December 15 - Sinรบ River in northwestern Colombia begins to flood as a result of heavy rains, it affects multiple localities within the Cรณrdoba Department, including the city of Monterรญa.
December 24 - Pedro Oliveiro Guerrero Castillo, drug lord and leader of the right-wing ERPAC militia, dies in Mapiripรกn, Meta, after police operations to capture him led to a raid on his hideout.[11]