An aftershock measuring 5.7 magnitude was felt Change_sentiment on January 15 , an event not widely reported Reporting outside the country until after the February quake , which initially was assessed by the USGS at 5.7 magnitude as well .

The 11 March earthquake Catastrophe was at first thought Coming_to_believe to be an aftershock Catastrophe from the 27 February event , but University of Chile seismologist Jaime Campos identified Check it as an independent earthquake Catastrophe .

A magnitude 4.3 aftershock Catastrophe occurred Coming_to_be in the same area at 7.11 pm on 20 July 2012 at a similar depth .

This aftershock Catastrophe is the strongest so far of over 200 that have occurred Coming_to_be since the initial quake Catastrophe .