The essence of MSc (cont.)
l Finally, the time-space considered is divided into
small boxes  (i,j,k) of the size (s ´ s ´ u).
l "Quiet" boxes are singled out for each small
square (i,j);  they are defined by the condition that
nij(k)  is below the Q percentile of nij.
l The clusters of q or more quiet boxes connected
in space or in time are identified.
l Area V is the territorial projection of these
clusters.
Sixth Workshop on Non-Linear
Dynamics and Earthquake Prediction
The Abdus Salam ICTP, Miramare
22/10/2001
6