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<p>Active tectonics and coastal deformation predispose continental margins to submarine gravitational instability and canyon head retreat. Here we investigate the drivers of this susceptibility along the Italian coasts. We analyze a dataset of over 2700 canyon heads using a multi-parametric susceptibility model that integrates bathymetry, instrumental seismicity, uplift rates, and crustal deformation fields derived from satellite geodesy. Results indicate that proximity to river mouths and regional seismicity are primary drivers of retreat susceptibility, suggesting that such susceptibility characterizes canyon dynamics at least since the establishment of the current tectonic regime. By integrating these results with demographic exposure data, we identify priority areas for mitigating natural disasters such as landslide-generated tsunamis and coastal erosion in highly populated regions.</p>

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Tectonic activity and river mouth proximity drive submarine canyon retreat along Italian coasts

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月12日

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  • Nicolò Parrino,
  • Francesco Caldareri,
  • Pierfrancesco Burrato,
  • Mimmo Palano,
  • Salvatore Stramondo,
  • Valeria Lo Presti,
  • Mauro Agate,
  • Maurizio Gasparo Morticelli,
  • Attilio Sulli

摘要

Active tectonics and coastal deformation predispose continental margins to submarine gravitational instability and canyon head retreat. Here we investigate the drivers of this susceptibility along the Italian coasts. We analyze a dataset of over 2700 canyon heads using a multi-parametric susceptibility model that integrates bathymetry, instrumental seismicity, uplift rates, and crustal deformation fields derived from satellite geodesy. Results indicate that proximity to river mouths and regional seismicity are primary drivers of retreat susceptibility, suggesting that such susceptibility characterizes canyon dynamics at least since the establishment of the current tectonic regime. By integrating these results with demographic exposure data, we identify priority areas for mitigating natural disasters such as landslide-generated tsunamis and coastal erosion in highly populated regions.