On the still unpredictable but recurrent lahars: the November 26, 2022 case study at Ischia island (Italy)

• DOI: 10.5194/egusphere-egu24-10028
• Publication Date: 2024-03-08T19:51:51Z
• Authors: Domenico Doronzo; Dario Delle Donne; Eliana Bellucci S...; Vincenzo Convertito; Mattia de'Michiel...; Sandro de Vita; Federico Di Traglia; Rosa Nappi; Lucia Nardone; Rosella Nave; Fabio Sansivero; Mauro Di Vito
• Keywords: Lahar

Lahars, landslides and debris flows are rapid natural phenomena that can heavily impact on modify the environment, not only from which they triggered but also one in propagate or leave deposits. In particular, lahars reach significant runout distances source areas (e.g., several km) this mainly depend, among other factors, morphology experienced by such propagation. There cases recent history of occurrences impacted catastrophically rural urban settings, as for example at Nevado del Ruiz volcano (Colombia) 1985 causing death thousands people living around there. A more event occurred November 26, 2022 Ischia island (Italy), is an active particularly subjected to recurrence these phenomena. case, emplacement some caused a few tens damaging building, besides direct local agriculture tourism. nearby Neapolitan volcanic area, lahar events historical past, during after well explosive eruptions, evidence still be considered complex often unpredictable extreme events, exacerbated climate changes, have cannot neglected. Such kind related weather, even affect intrinsic behavior detach invade territory. On hand, strictly statistical issue, there instrumental measurements support fact heavy rains exacerbate landscape already prone sliding, avalanching, catastrophic For this, case study was chosen with goal reconstructing physical features led generation invasion, something might occur future should dedicated scientific territorial consciousness. What done integration multidisciplinary approaches, corroborated data INGV-OV monitoring network installed volcano, capable detecting otherwise lost flow timing dynamical behavior. seismic accompanied along consideration lithological leading estimation velocity dynamic pressure, allow discriminate multiple pulses over early morning 2022. The main findings contribution potential had sort recharge timespan depended weather features, while threshold trigger hydrogeological conditions. reconstruction entire allowed quantify first two critical issues island.