Fox has this as breaking news
http://www.foxnews.com/story/0,2933,330401,00.html
Magnitude-6.6 Earthquake Hits Southern Mexico, Effects Felt Hundreds of Miles Away
Entirely different quakes/regions, RDTF! Yours IS a large quake! Yours is near the southern Mexican border, maybe 1500 nautical miles from the Calexico shaker.
My personal dividing line is 6.0 mag; larger is a big deal and potentially significant damage, and less will definitely wake you up if it's nearby ... but just isn't a big deal.
Having said all that, TWO mid-5 shakers on the San Andreas fault in a short period COULD be pre-shocks to something bigger coming nearby. That could be tomorrow ... or a year from now.