There has been about 46 aftershocks total so far around Chile area, all of them are around 35 Kilometers below the surface, and are between 5.2 and 6.9 magintudes.
Updates here: http://earthquake.usgs.gov/earthquak...us2010tfc3.php
Salta, Argentina just got hit with it's own earthquake too, so expect aftershocks there. Epicenter 6.3 magnitude, 38.2 kilometers below the surface.
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