I'm now thinking that Monday's 4.7 was just a leftover from the intense activity of last week. That truly was the first signal of a large quake. Looks like there isn't a second signal. That activity really shook things up a lot so we can expect a period of quiet.
During that time, all the wells they closed will open up again, and inject like mad. Natural gas prices have tanked due to El Nino winter warming, so there might be less gas frack waste. I am therefore hoping for a quiet Christmas, but who knows?
During this time, they can extend the injection to the 'virgin' territory SW of the northern shear line. An M7 only requires 30 km of fault, which they have. They can go on to an M8 when they extend it to 300 km.