GNGTS 2022 - Atti del 40° Convegno Nazionale

GNGTS 2022 Sessione 3.2 409 The IRT technique allowed highlighting an anomaly in the presbytery wall due to the different thermal response between the filling and the surrounding masonry; no other anomalies were detected. The GPR survey performed through the nave allowed recognising the crypts below the paved floor; some anomalies are clearly located in correspondence of the trapdoors visible along the nave, thus determining clearly positions and dimensions. At the same time the GPR reflections allowed verifying crypts’ status: they seem to be intact and empty. The TLS survey provided an accurate picture of the fractures and deformations inside the church: the most damaged portion is the altar area. Furthermore, other fractures are recognised in the lintel door of the bell tower and in some altars. However, it is not possible to identify the original cause of the damage since the use of bulldozers in the excavations worsened in some way the original setting of the site. In conclusion, the survey confirms that lava did not damage the lower part of the church, whereas the walls reacted in a completely different way, firstly the lava weakened the northern and western walls and shortly after entered from the roof. The reconstruction interventions made by the restoration plan are consistent with our results. References Amico V.; 1757: Dizionario topografico della Sicilia , Tradotto dal latino ed annotato da Gioacchino Di Marzo, ristampa anastatica; Forni Ed., Palermo. Boschi E. and Guidoboni E.; 2001: Catania, terremoti e lave: dal mondo antico alla fine del Novecento . INGV Roma, Bologna SGA. Branca S., Azzaro R., De Beni E., Cheser D., and Duncan A.; 2015: Impacts of the 1669 eruption and the 1693 earthquakes on the Etna Region (Eastern Sicily, Italy): An example of recovery and response of a small area to extreme events . J. Volcanol. Geotherm. Res., 303 , 25-40. Branca S., De Beni E., and ProiettiC.; 2013: The large and destructive 1669 AD eruption at Etna volcano: Reconstruction of the lava flow field evolution and effusion rate trend . Bull. Vulcanol., 75 , 694. Garozzo R.; 2017-2018: La chiesa madre dell’antica Misterbianco in contrada Camapanazzu , Tesi di Laurea, Università di Catania. Garozzo R., Lo Turco M., Santagati, C.; 2019: Modelli informativi e gestione della complessità per un progetto integrato di conoscenza . Diségno , 4 , 225-236.