Red spot at the lower left.
I can't really believe this. It must be some injection outside their phoney boundary. If such a strong line were to be really developing this fast, it would be a new thrust fault, giving away totally on its own. I included the New Madrid zone to show how its thrust zone is parallel.
A conjugate fault set is the only one that signals a larger earthquake, since the growth is so clear. When I talk about these things I expect them to develop over a very long time, not weeks.