5.0 might be pushing it. Especially since we've seen 4.2 as the highest thus far. I guess anything is possible. I was actually holding out for a 6.0.
I think the profile might be a bit different than west coast quakes given the different fault configurations etc (I am by no means an expert though). Might have a more gradual aftershock profile - rather than a bunch quickly fizzling we might have one or two for the next few weeks (each week that is).