Hi,
Wish I had more time to explain this, so stick with me. I have a neat little app on my Ipad called "Quake Watch" and it does show, should you like to see much smaller quakes, technically down to 1.0 but in this situation of a great quake, it may be overwhelmed. It lists and has maps and is very user friendly - I use it so that says something! Anyway, I've found them down to 4.3 just now. My daughter is a geo major at Boulder and uses it all the time, so it goes beyond the generations. Hope it helps!
Beth