Summary
Stromboli is an active insular volcano located in the Southern Tyrrhenian Sea and is characterized by a bilateral symmetry of its flanks with respect to the main SW–NE rift axis, leading to the occurrence of repeated lateral collapses affecting its SE and NW flanks. Particularly, the NW flank was affected by five collapses in the last 13 ka, the last of them likely occurred during medieval times, leading to the development of the Sciara del Fuoco scar, SdF hereafter. Nowadays, the SdF acts as a main channel way for funnelling into the sea a large amount of volcaniclastic material produced at the summit crater terrace by persistent Strombolian activity. This activity is temporarily interrupted by larger paroxysms or effusive eruptions, during which the stress-strain state of the Sdf slope can be modified, leading to the development of landsliding processes ranging at different spatial scales. During the 2002 eruptive crisis, two tsunamigenic landslides occurred, the first of which submarine followed 7 minutes later by a subaerial one, generating tsunami waves with maximum run-up of 10 m. Since then, the SdF slope was carefully monitored through repeated topo-bathymetric surveys, which are part of a complex monitoring system funded by Department of Civil Protection in Italy, including ground-based thermal infrared data, infrasonic monitoring, seismic network, borehole strain meters, dilatometric sensors, ground tiltmeters, plume and soil gas geochemical monitoring, two ground-based interferometric synthetic aperture radar sites, and satellite thermal monitoring. In this talk, the results of 20 years of bathymetric monitoring of the SdF slope are summarized, providing insights on the tsunamigenic landslides occurred in 2002, the formation and partial dismantling of lava delta formed in 2002, 2007 and 20148, pyroclastic density currents generated during the two 2019 paroxysms that entered the sea, generating very small tsunami waves.
Brief biography
Casalbore Daniele is a marine geologist, graduated (cum laude) at the Sapienza University of Rome in 2005. He earned his Ph.D. in Earth Science at the University Alma Mater of Bologna in 2009, spending six months at Laval University in Quebec (Canada) as visiting researcher. From 2009 to 2015 he worked as Post-doc at the Italian National Research Council. From 2015 to 2018 he was research fellow at Sapienza, University of Rome. Since 2018 he is permanent researcher at the Italian National Research Council and since 2020 tenure-track assistant professor at Sapienza University of Rome, teaching the courses of Geology, Marine Geophysics and Marine Geology. His research activity has been mostly focused on the morpho-bathymetric and seismo-stratigraphic analysis of continental margin and submarine flanks of insular volcanoes, with particular reference to the study of mass-wasting processes and associated consequences. In the last years, he has also worked on cold seeps and paleo-landscape reconstruction of (submerged) historical and prehistoric sites as well as on the use of marine markers as proxy of past sea level positions and vertical mobility, such as the outer edges of reefless insular shelves. Since 2011 he is collaborating with researchers from ICM-CSIC on the study of submarine volcanoes (Azores Island), shelf-indenting canyons and reconstruction of historical tsunamigenic landslides in active continental margins. He has participated to 20 national and international projects (some of them as Principal Investigator or Work Package coordinator) as well as to 45 oceanographic cruises mostly in Mediterranean Sea and Atlantic Ocean, some of them as chief scientist. He also co-organized sessions on national/international congresses, participated as member of organizing committee in two international congresses and is presently involved in the organization of the 2023 INQUA congress that will be held in Rome.