Natural hazards, 2009, doi: 10.1007/s11069-009-9359-2
V. Convertito, R. De Matteis, L. Cantore, A .Zollo, G. Iannaccone and M. Caccavale
Strong ground-shaking mapping soon after a moderate-to-large earthquake is crucial to recognize the areas that have suffered the largest damage and losses. These maps have a fundamental role for emergency services, loss estimation and planning of emergency actions by the Civil Protection Authorities. This is particularly important for areas with high seismic risk levels, such as the Campania-Lucania Region in southern Italy. Taking advantage of the Irpinia Seismic Network (ISNet), a recently installed dense and wide dynamic seismic network, we have developed a procedure for rapid estimation of ground-shaking maps after moderate-to-large earthquakes. This uses an optimal data gridding scheme designed to account for bi-dimensional features of
strong ground-motion fields, such as directivity, radiation patterns and focal mechanisms, to which most damage can be correlated. The basis of the mapping technique is a triangulation procedure to locally correct predicted data at the triangle barycentres where their vertices correspond to seismic stations. The method has been tested off-line using a simulated M 6.6 earthquake located at the centre of ISNet, and applied to data of the 23 November 1980 Irpina M 6.9 earthquake recorded by a sparse network. This has highlighted its ability to predict peak ground-motion parameters of large magnitude earthquakes with respect to the attenuation relationships.
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*Notice: This is an electronic version of an article published in Natural Hazards: complete citation information for the final version of the paper, as published in the print edition of Natural Hazards, is available on the Springer online delivery service, accessible via the journal's website at http://www.springerlink.com/content/3r8421630m76u867/