Preambolo al Catalogo Sismico Nazionale (CSN). I criteri di informazione del Catalogo Sismico Nazionale (CSN)

R. CONSOLE, C. GASPARINI, B. DE SIMONI, L. MARCELLI, M. C. SPADEA, M. VECCHI

Abstract


This note presents a study meant to set out a national catalogue
(C.S.N.) of seismic events the epicentres of which are to be found in
Italian territory (or nearby). The catalogue, that will start from the
year 1450 B.C., could be used for various purpose employing modern
technologies.
The complete C.S.N, is made of three main parts, each of which can
also have a separate life:
1) An Analytical Catalogue which comprises the greater part of
data and is the most complete;
2) A Macroseismic Atlas that shows the macroseismic aspect of
the most relevant events;
3) A Macroseismic Catalogue that translates in numeric terms the
Atlas.

To these is added a comprehensive Bibliography subdivided into 24
chapters each of which covers one of the 24 time periods into which the
catalogue has been subdivided.
The Analytical Catalogue besides giving the main parameters for each
earthquake (date, epicentre, hypocentral depth, MCS scale intensity, raagnitudo,
each with its own reliability index) gives indications also on the
following sideline data:
1) epicentral location (meaning by this the geographic region and
the eventual indication that the epicentre is to be found on a borderline
touching more geographic regions, or in the sea, or on the coast, or othermise
in the external band (see text);
2) with a reference to the Atlas, the event is shown as having been
dealt with also mocroseismic data and it will con be found, as such, in
the Atlas and in the Macroseismic Catalogue;
3) indications on the typology of the earthquake: i.e. whether it is an
« isolated » earthquake, or a « seismic period » (and if so with the indication
of the foreshock, main or aftershocks) or of a swarm;
4) the possibility of indicating up to 7 sets of information suitably
chose among 40 additional notes regarding instrumental, geophysical,
physical or sensorial information besides the possibility of notifying
that the event had undergone specific studies or whether it is even to be
considered either noth sure or else legendary;
5) the possibility of indicating up to four bibliographical items, is to
be considered as capital.
The Macroseismic Atlas gives the isoseists of the more supported by
documentary evidences earthquake, with the calculation of the relative
areas, of the rays of the equivalent circles and of the rays of prevalent
maximal and minimal propagation; these latter with the value of the
azimuth measured from the geographical North passing through the
macroseismic epicentre.
The Macroseismic Catalogue reports numerically the macroseismic data
of the event: analytical and macroseismic epicentre; analytical and macroseismic
hypocentral depth, numerical values, in km., of the the three
serie of indicated rays, up to isoseist of the 4th degree (MCS).
A fac-simile of working form is given.


Full Text:

PDF

References


DOI: https://doi.org/10.4401/ag-4729

Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X