“…Indeed, the recurrent and continuous explosive activity of the peri-Tyrrhenian volcanism, fed by potassic to ultrapotassic magmas (e.g., Peccerillo, 2017), as well as the presence of numerous Quaternary tectonic basins hosting thick sedimentary successions, constitute a unique combination which has allowed the retrieval of extremely rich tephra repositories and, consequently, eruption event stratigraphies. An increasing number of studies on marine (Keller et al, 1978;Paterne et al, 2008;Bourne et al, 2010Bourne et al, , 2015Tamburrino et al, 2012;Insigna et al, 2014;Morabito et al, 2014;Matthews et al, 2015;Petrosino et al, 2015Petrosino et al, , 2016D'Antonio et al, 2016), lacustrine (Wulf et al, 2004(Wulf et al, , 2008Petrosino et al, 2014a;Giaccio et al, 2015a;Di Roberto et al, 2018; Among the lacustrine successions hosted in the Pliocene-Quaternary inter-mountain tectonic basins of the central-southern Apennines (Italy), Fucino's is the most continuous and temporally resolved, with ~900 m of seemingly uninterrupted sedimentary infill, documenting the sediment accumulation since the Lower Pleistocene up to historical times (Cavinato et al, 2002;Giaccio et al, 2015b) and a rich tephra record (Giaccio et al, 2017(Giaccio et al, , 2019Di Roberto et al, 2018;Mannella et al, 2019;Del Carlo et al, 2020). Three factors make the Fucino Basin unique for reconstructing the eruptive history of the Italian peri-Tyrrhenian potassic to ultrapotassic volcanic activity and improving the central Mediterranean Middle Pleistocene tephrostratigraphic framework: (i) its relatively short distance from the peri-Tyrrhenian volcanoes of central Italy (~70 to ~150 km, Fig.…”