No such dare was intended.

As I've suggested before, I tend to view the idea of predicting tiny earthquakes rather along the lines of how I would treat a marksman who claimed to be able to shoot the ace of spades at 100m but couldn't guarantee to hit a barn at the same range.

Don's prediction names a tiny Welsh village, but then gives an error radius of 80 km that takes in most of Wales. Well, I suppose that's playing by the rules, it just looks odd.

Time window? Is it just for those days?

I can't guarantee that anything less than 2.0 would even be recorded, and only the upper end of Don's magnitude range would be felt. The average occurrence rate of magnitude 2+ events within the 80 km circle is probably about 1 per year.