in actuality, aftershocks will continue for weeks. the biggest ones within the first couple of weeks. However, this area is generally very active seismically active, so it could become difficult soon to separate the aftershocks from non-related shocks.
Given there are large aftershocks in both directions along the fault involved, it looks like this could have been a simultaneous bilateral rupture from a central epicenter (Like the 1906 San Franscisco Quake.)
Main quake was on the Laguna Salada Fault zone, and this appears like it may be a duplicate of an earthquake in 1892.