Updated at 2:53 pm ET (1953 UTC). Even though the flare peaked and quickly subsided, the proton flux at GOES as risen substantially. Here is the GOES protons fluxes (different colors are different energies). A flare at the limb shouldn't produce a large increase in the proton flux, but this one did!
Another X-class flare is happening right now! AR 11402 has let loose with an X-class flare as it disappears over the limb. Here is the EVE flare watch page (on left) and the SWPC X-ray flux (right).
It's a great week for Space Weather!