Well, at least there were no earthquakes yet reported in the area this morning.
Volcanism is certainly a possibility. There are volcanic sites throughout
the region of northern New Mexico and southern Colorado some fairly recent.
In cross-section the Colorado Rocky mountains look much like a mid-ocean
rift system with two ranges on either side of a central graben, and hot spots
line the entire range. Some have suggested this is the surface manifestation
of the continuation of a subducted east-Pacific rise - hard to say, but there
is ample evidence of magma and volcanism in the region.
I had not heard of the report of miners being scalded around 1900 but
it would certainly add to the evidence of possible volcanism.

Thanks for the legwork Scorpio.