Rise of activity, i.e. inverse cascading, at the approach of an extreme event

Variation of seismic activity


V(t ½m,s,u) = Var N(t \| m,s) is variation of
	the number of earthquakes on the time

	interval (t-u,t),

which is the total of absolute differences
	between N(t \| m,s) at two consecutive
	times t_i+1 and t_i from the time interval
	(t-u,t).


		Sixth Workshop on Non-Linear
Dynamics and Earthquake Prediction
	The Abdus Salam ICTP, Miramare

16/10/2001