Abstract
This paper describes the main characteristics, the evolution, and
the structure of the Database of Individual Seismogenic Sources (DISS)
and particularly of its release of early 2007. The Database contains
the results of the investigations of the active tectonics in Italy
during the past 20 years. The first two sections of this paper document
the recent evolution in mapping and archiving Italian active fault
data in relation to important achievements in the understanding of
Italian tectonics, some of which were spurred by significant earthquakes.
The central sections describe the current structure of the Database,
the reasons for its assumptions and data categories, its current
contents, its evolution through several years of improvements. The
last section describes how the current contents of the Database correspond
with the existing strain and stress data available from focal mechanism,
borehole breakout, and GPS data for the whole of Italy. The Database
supplies a fresh and unified view of active and seismogenic processes
in Italy by building on basic physical constraints concerning rates
of crustal deformation, on the continuity of deformation belts and
on the spatial relationships between adjacent faults, both at the
surface and at depth.
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