The Italian CMT dataset (from 1976 to present)
This page is the result of a compilation of all
centroid moment tensors computed for the Italian region for the entire period
of availability of digital seismographic data, e.g. 1977 to present. In the
map,
red solutions are from the
Global CMT Catalog,
blue solutions are from the
European-Mediterranean RCMT Catalog,
green solutions are from
previous papers
and
yellow solutions are from this
work.
We merged the existing global CMTs and European-Mediterranean
RCMTs data for the Italian region with those computed to extend backward
the Euro-Mediterranean RCMT catalog (Pondrelli et al., 2006). We obtained
a wide dataset covering the 1977-to-present period, more than 25 years
of seismic activity. All together we have 338 centroid moment tensors, for
shallow and intermediate depth earthquakes, with magnitude between 4.0 to
6.9.
Some of these moment tensor solutions are already included
in the Global CMT Catalog. But surface waves at regional distance (inverted
to compute RCMTs) have a better signal-to-noise ratio than long period
body or mantle waves at global distance (inverted to compute CMTs), and
the RCMT method appears more appropriate for modelling smaller magnitude
seismic sources. Therefore, when both solutions exist for an earthquake,
we chose the RCMT when Mw 5.5, and the CMT solution otherwise.
ACCESS THE ONLINE DATA
(read the description of
the formats):
Please reference these data as:
Pondrelli, S., S. Salimbeni, G. Ekström, A. Morelli, P. Gasperini
and G. Vannucci, 2006, The Italian CMT dataset from 1977 to the present,
Phys. Earth Planet. Int., doi:10.1016/j.pepi.2006.07.008,159/3-4,
pp. 286-303.
ADDITIONAL REFERENCES
Back to European-Mediterranean RCMT Catalog
Up to Bologna INGV