Various maps of the 8.8 quakehttp://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/us2010tfan.php#mapsSouth America seismicity map.http://earthquake.usgs.gov/earthquakes/recenteqsww/Maps/region/S_America.phpList of earthquakes on that maphttp://earthquake.usgs.gov/earthquakes/recenteqsww/Maps/region/S_America_eqs.phpI'm counting 8 earthquakes over 6.0 at that location. One of the aftershocks was 6.9 -- any one of those "aftershocks" would be the screaming news headline if it hit anywhere in the U.S.
54 additional aftershocks so far measuring over 5.0