High Quality Content by WIKIPEDIA articles! The 2010 Pichilemu earthquake (Spanish: Terremoto de Pichilemu de 2010), also known as the Libertador O`Higgins earthquake, was a 6.9 MW earthquake that struck Chile`s O`Higgins Region on 11 March 2010 at 11:39 local time (14:39 UTC). The earthquake was centred 15 kilometres (9.3 mi) northwest of the city of Pichilemu, according to the University of Chile Geological Service.