GNGTS 2022 - Atti del 40° Convegno Nazionale

GNGTS 2022 Sessione 1.1 81 1087, along the Italian Adriatic coast of Puglia region. CFTI5med located this earthquake east of Barletta, with epicentral intensity Io = VIII MCS, Imax = IX while CPTI15v4 located it near Bari (Io VI-VII) on the base of a single source describing minor damage in the city (Protospatarius, 1844). Integrating the historical information with archaeological and geophysical data for the Durres amphitheater, we advance the hypothesis that the 1087 earthquake was only felt on the Italian coast, but it had its epicenter in Albanian territory. This hypothesis can be supported by the observation of the recent earthquakes occurred along the Albanian coast and widely felt along all the Adriatic Italian coast i.e., the Durres 2019 earthquake (Mw 6.3), the Petrinja 2020 one (Mw 6.4), and the seismic event that occurred in Bosnia (22 April 2022, Mw 5.7). Maps of the effects of these earthquakes (M W >5.5) from the web questionnaires (Tosi et al., 2007) clearly show that the felt intensity in the Italian sites is up V MCS. In particular, many questionnaires after the 26 November 2019 (Mw 6.3, Io>VIII EMS-98), reported values of Is = V MCS mainly along the coast of the Puglia region. Can the 1087 earthquake be a Durres “lost” earthquake? The confirmation of this hypothesis could have important implication on seismic hazard evaluation. References Ambraseys, N., 2009. Earthquakes in the Mediterranean and Middle East: A Multidisciplinary Study of Seismicity up to 1900. Cambridge University Press, Cambridge. https://doi.org/10.1017/CBO9781139195430 Antonopoulos, J., 1979. Catalogue of Tsunamis in the Eastern Mediterranean from Antiquity to Present Times. Casolino C., L’età medievale (XI-XIII secolo) , in Antonelli S., Metalla E., Moderato M., Sassi B. (eds), Dyrrachium IV. L’anfiteatro romano di Durrës (Albania). Scavi e ricerche (2004-2011), Bari in press. Grünthal, G., Wahlström, R. The European-Mediterranean Earthquake Catalogue (EMEC) for the last millennium . J Seismol 16, 535–570 (2012). https://doi.org/10.1007/s10950-012-9302- Guidoboni, E., Comastri, A., 2005. Catalogue fo earthquakes and tsunamis in the Mediterranean area from the 11th to the 15th century . Guidoboni E., Ferrari G., Mariotti D., Comastri A., Tarabusi G., Sgattoni G., Valensise G. (2018) - CFTI5Med, Catalogo dei Forti Terremoti in Italia (461 a.C.-1997) e nell’area Mediterranea (760 a.C.-1500) . Istituto Nazionale di Geofisi- ca e Vulcanologia (INGV). doi: https://doi.org/10.6092/ingv.it-cfti5 Guidoboni E., Ferrari G., Tarabusi G., Sgattoni G., Comastri A., Mariotti D., Ciuccarelli C., Bianchi M.G., Valensise G. (2019), CFTI5Med, the new release of the catalogue of strong earthquakes in Italy and in the Mediterranean area , Scientific Data 6, Article number: 80 (2019). doi: https://doi.org/10.1038/s41597-019-0091-9 Jouanne, F., Mugnier, J.L., Koci, R., Bushati, S., Matev, K., Kuka, N., Shinko, I., Kociu, S., Duni, L., 2012. GPS constraints on current tectonics of Albania. Tectonophysics 554–557, 50–62. https://doi.org/10.1016/j.tecto.2012.06.008 Mancini, M., 2020. Site characterization in Durrës (Albania) from a seismic microzonation perspective. BGTA Bolletti- no di Geofisica Teorica e Applicata. https://doi.org/10.4430/bgta0344 Métois, M., D’Agostino, N., Avallone, A., Chamot‐Rooke, N., Rabaute, A., Duni, L., Kuka, N., Koci, R., Georgiev, I., 2015. Insights on continental collisional processes from GPS data: Dynamics of the peri‐Adriatic belts. J. Geophys. Res. Solid Earth 120, 8701–8719. https://doi.org/10.1002/2015JB012023 Molin, D., Guidoboni, E., 1989. I terremoti prima del Mille in Italia e nell’area mediterranea . Protospatarius L., Annales, ed. Pertz G. H., in “Monumenta Germaniae Historica” , SS., tomo 5, pp. 52-63, Hannover 1844 Rovida A., Antonucci A. (2021). EPICA - European PreInstrumental Earthquake CAtalogue, version 1.1. Istituto Nazio- nale di Geofisica e Vulcanologia (INGV). https://doi.org/10.13127/epica.1.1 Rovida A., Locati M., Camassi R., Lolli B., Gasperini P. (2020). The Italian earthquake catalogue CPTI15. Bulletin of Earthquake Engineering, 18(7), 2953-2984. https://doi.org/10.1007/s10518-020-00818-y Rovida A., Locati M., Camassi R., Lolli, B., Gasperini P., Antonucci A., 2022. Catalogo Parametrico dei Terremoti Ital- iani (CPTI15), versione 4.0. Istituto Nazionale di Geofisica e Vulcanologia (INGV). https://doi.org/10.13127/CPTI/ CPTI15.4