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deals with the problems connected with the use of macroseismic scales, with particular attention to MSK 81
and the EMS 92, in the case of two Italian localities (Fabriano in the Marche region and Orciano in North-
Western Tuscany) damaged by two earthquakes (1741. April 24 and 1846, August 14) which have a good historical
documentation. Nevertheless, it is difficult to obtain the data required by the scales. It follows that intensity
estimates are in principle affected by some uncertainties which have been analysed.
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