Simplify the following text for a Grade 14 native English-speaking person.
Original: Although news media reported the earthquake as an aftershock of the February earthquake in Chile , a preliminary geological summary issued by the United States Geological Survey considered it to be an independent earthquake , a conclusion which seismologist Jaime Campos of the University of Chile also reached .
Simplified: Although news media first reported the earthquake as an aftershock of the February earthquake , the initial geological summary given by the United States Geological Survey said it was an independent earthquake .