  In this work, we introduce a new methodology to construct a network of
epicenters that avoids problems found in well-established methodologies when
they are applied to global catalogs of earthquakes located in shallow zones.
The new methodology involves essentially the introduction of a time window
which works as a temporal filter. Our approach is more generic and for small
regions the results coincide with previous findings. The network constructed
with that model has small-world properties and the distribution of node
connectivity follows a non-traditional function, namely a q-exponential, where
scale-free properties are present. The vertices with larger connectivity in the
network correspond to the areas with very intense seismic activities in the
period considered. These new results strengthen the hypothesis of long spatial
and temporal correlations between earthquakes.
