The 847 CE earthquake in central-southern Italy: New hints from archaeosismological and geophysical investigations in the Volturno River Valley area

摘要: Abstract Integration of archaeoseismic observations, geological and geophysical surveys a critical review historical written sources contributed to shed light on the effects 847 CE earthquake that struck large area southern-central Italy. New evidence strong which occurred around middle ninth century CE comes from two Medieval archaeological sites along Volturno Valley, between Campania Molise regions. Historical documentation its include tilting pillars in Basilica Santa Maria near Alvignano (northern region) collapsed masonry wall Abbey San Vincenzo al Isernia region). At Alvignano, site so far unrecorded seismic catalogues for 847 earthquake, geoelectrical georadar investigations were used explore subsoil study local conditions, could have influenced co-seismic ground motion. Interpretation calibrated by stratigraphy available boreholes document presence altered pyroclastic deposits, likely enhanced at Alvignano. Analysis damage descriptions reports indicates event damaged wide Latium, Molise, with destruction town damages Rome. Because this medieval is loosely defined literature, present represents contribution better define shaking provide new hints extent location possible seismogenic source.