Baja M7.2 quake followed by California event

A magnitude 7.2 earthquake hit northern Baja California this afternoon at 3:40 pm local time, knocking goods off shelves in stores in Yuma and caused weak to light to moderate shaking across large areas of western Arizona.  The epicenter is about 40 miles south of the border.

There's been at least one significant aftershock of magnitude but surprising to me is the magnitude 5.1 quake that hit Imperial, California about 35 minutes after the Baja event, on what appears to be a different fault.

This has to raise the question of whether the Baja quake triggered the Imperial quake.