That makes sense too.

The higher probability obtained by the larger radius, however is offset by the
lower probability of a larger event. Since each increase in magnitude decreases
the likelihood of an event by a factor of about 10 or thereabouts - there are 10 times
as many 4's as 5's e.g. - and an increase in radius of 1.25 (5/4) increases the
area by only a factor of 1.56, the probability of the larger event at a greater distance
should still be smaller than the probability of a smaller event close by.