GNGTS 2024 - Atti del 42° Convegno Nazionale

Session 1.3 GNGTS 2024 On opposite sides of Naples: an intriguing contemporaneous onset of deep defaton below Vesuvio and the ongoing Campi Flegrei uplif. A. Amoruso 1 , L. Crescentni 1 1 Department of Physics, University of Salerno, Fisciano, Italy Campi Flegrei and Vesuvio volcanoes are located on opposite sides of Naples and it is of great interest to get clues of possible mutual interactons or coincidences in their recent deformaton dynamics. As for Campi Flegrei, afer the large uplif occurred at the beginning of the 80s and the general subsidence from 1985 to 2001, since the early 2000s it is uplifing mostly at an acceleratng rate and its dynamics is probably driven by deep magma infaton (Amoruso and Crescentni, 2022). As for Vesuvio, we analysed the ground displacement tme series in the whole Vesuvian area and its surroundings around the early 2000s, using 1993–2010 ERS/ENVISAT ascending- and descending-orbit line-of-sight displacements. Our computatons show a sudden trend change around 2001: pre-2001 velocity maps indicate subsidence mainly occurring inside the caldera rim and in a few spots around 10 km from the summital crater, thus confrming previously published results by others; post-2002 velocity maps provide evidence of general subsidence in the whole Vesuvian area. This last arrangement of the ground displacement feld is made even clearer by subtractng the post-2002 velocity from the pre-2001 one and is consistent with the defaton of a deep pressurised source and the decrease of Vesuvio’s deep seismicity at the beginning of 2002. (Amoruso and Crescentni, 2023) The reveal of the coincidence between the transiton from defaton to infaton at Campi Flegrei and the onset of defaton below Vesuvio may suggest the possible transfer of magma and/or magmatc fuids and the infuence of the dynamics of one plumbing system on the other. Reference Amoruso A. and Crescentni L.; 2022: Clues of Ongoing Deep Magma Infaton at Campi Flegrei Caldera (Italy) from Empirical Orthogonal Functon Analysis of SAR Data. Remote Sens., 14, 5698, DOI 10.3390/rs14225698. Amoruso A. and Crescentni L.; 2023: DInSAR Data Reveal an Intriguing Contemporaneous Onset of Deep Defaton below Vesuvio and the Ongoing Campi Flegrei Uplif. Remote Sens. 2023, 15, 3038. DOI 10.3390/rs15123038. Corresponding author: aamoruso@unisa.it