The Likelihood function for whole experiment of N events is
defined as:
This is---up to a constant---the probability of the the true length and certain
theoretical assumptions we represent as T.
in conditional probability notation.
T is, for instance, the notion that distribution Gaussian and
the value of taken (the latter being calculable from the
strength of earthquake amount of beer drunk).
the true length 
and certain
theoretical assumptions we represent as T.
taken (the latter being calculable from the
strength of earthquake 
amount of beer drunk).