[Hoot Gibson]

What would the possibility be of old works caving in?? You know rib rolls, roof collapse and coal blow outs? Could that trigger a richter scale reading??

Zero chance that this earthquake is related to roof falls in coal mines. The epicenter was 0.7 miles below the surface. The deepest coal mines in the country are in Alabama, and none of them are deeper than 0.4 miles below the surface. If roof falls could cause earthquakes that could be felt hundreds of miles away, then longwall mining, which depends on timely roof falls, would be illegal.