There are 2 faults in the north of DR, the North Hispaniola fault (offshore) & the Septentrional fault. I always thought the 2003 EQ was situated on the offshore fault?? 'The large north-south extent of the aftershock zone, the mainshock focal mechanism, and geologic evidence for an active fold-thrust belt offshore of Hispaniola indicate that the 2003 earthquake occurred on the south-dipping thrust fault mapped offshore of and beneath Puerto Plata.'