Advances in Geosciences www.adv-geosci.net 1680-7340 1680-7359 19 Geophysical monitoring of the near-surface by electromagnetic and other geophysical methods 2008 10.5194/adgeo-19-23-2008 http://www.adv-geosci.net/19/23/2008/ http://www.adv-geosci.net/19/23/2008/adgeo-19-23-2008.html http://www.adv-geosci.net/19/23/2008/adgeo-19-23-2008.pdf 23 32 2008-11-14 Historical damage pattern and causes of differential damage: an approach based on combining geophysical prospecting, geological and historical-technical data F. T. Gizzi f.gizzi@ibam.cnr.it V. Lapenna N. Masini E. Rizzo Istituto per i Beni Archeologici e Monumentali (IBAM) CNR-Area della Ricerca-Tito Scalo (PZ)-C.da S. Loja 85050, Italy Istituto per le Metodologie Avanzate di Analisi Ambientali (IMAA)- CNR-Area della Ricerca-Tito Scalo (PZ)-C.da S. Loja 85050, Italy We describe a multidisciplinary and interdisciplinary method to analyse the causes of differential macroseismic effects caused by an earthquake in a historical town. We illustrate the method with a case study based on analysing the damage caused by the 1930 Irpinia earthquake (Me=6.7) in Melfi, a town in southern Italy. A damage pattern map was already available for this site. <br><br> To understand the anomalies of Melfi damage, we used an integrated approach that combines geological surveys, geophysical prospecting and analysis of unpublished technical-historical data. <br><br> Geo-electrical prospecting was adopted to infer the geological set-up and to estimate the thickness of shallow deposits. The results of the geophysical surveys were compared with detailed geological information derived from both in situ surveys and boreholes. Finally, cross-correlation among these data and technical reports coeval to the earthquake allowed us to create a complete picture of the possible causes of uneven damage. 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