There's been a large 6.0 earthquake every day on the Eastern American coast for a week. It is an unusual amount of activity. Dutchsinse gives a list of all the places that might soon get hit with a large earthquake. Yellowstone looks quiet right now, he says, but earthquake activity is high, induced by the sun passing overhead, and pressure is building.
In Europe there are also a number of possible earthquake scenarios including the east coast of the UK. We are in a state of tremendous unrest. An earthquake will strike somewhere, causing major infrastructure damage. Of that he is sure.
The Australian plate is breaking up sending stress around the ring of fire.