Well, it was a shock wave from the energy released from an earthquake fault line breaking free. The chances of a fault line going down your specific street are very low.
I only say that so that you won’t think your home may have been a bad purchase.
This was probably what you were thinking anyway, even though your terminology made it seem different.
Hope you didn’t have any damage.
Yet another update: Back down to a 5.8 Magnitude; 3.5 miles deep.
thanks for the technical breakdown. I’m pretty certain that a faultline was not running down the street, I was just being factious.