Eathquake hazard/underground mining/Utah

[rf]

One shouldn't speculate, but wouldn't the most likely scenario be
a large roof/span collapse in an older area of the mine. With a large
span of roof in a mined out area falling, a large volume of air would
be displaced, but it likely would only cause an air blast in the
constricted entrance tunnel? Wouldn't it be correct to expect
that there is an excellent chance here that they will all be rescued?

Also the idea of an earthquake causing the collapse, should be a
very unlikely possibility? Earthquakes should not present a substantial
hazard to underground workings, at least not like on surface. In the
rock deeper below the surface, the vibrations from an earthquake are
not resonating as they would in surface soils, and they are generally too
fast to generate movement that could collapse an underground
excavation?

[stolarskin]

So the company can blame the earthquake and
avoid a BIG claim and lawsuit.
Makes perfect sense.