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

Entropy


Many other measures of clustering

	were proposed in the literature. For

	example, *Shannon entropy* –

		- S q_i × ln q_i

where q_i is some time dependent
	probability estimate of occupation of

	a given cell of the grid, i.e., n_i/N.


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

16/10/2001