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 Pondrelli et al., 2006(update to 2005).

We merge 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 obtaine a wide dataset covering the 1977-to-present period, more than 35 years of seismic activity. All together we have more than 450 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 UPDATED TO 2011
(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 

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