S is proportional to
l the total linear size of earthquake sources
 if b=B/3
l the total area of the earthquake sources
if b=2B/3
l the total energy of earthquakes
if b=B.
where B comes from the relation between
the energy, E, and magnitude, M
Iog E = A + BM
Sixth Workshop on Non-Linear
Dynamics and Earthquake Prediction
The Abdus Salam ICTP, Miramare
16/10/2001
11