It's a really long link, but this is to an NEIC quake catalog search generated map of the region showing all quakes mag 4+ from Sept 1st, 2010 thru Feb 20th, 2011 - before the recent quake.

Brian

http://neic.usgs.gov/cgi-bin/epic/epic.cgi?SEARCHMETHOD=2&FILEFORMAT=5&SEARCHRANGE=HH&SLAT2=-43&SLAT1=-44&SLON1=171&SLON2=174&SYEAR=2010&SMONTH=9&SDAY=1&EYEAR=2011&EMONTH=2&EDAY=20&LMAG=4.0&UMAG=9.9&NDEP1=&NDEP2=&IO1=&IO2=&CLAT=0.0&CLON=0.0&CRAD=0.0&SUBMIT=Submit+Search