Submarine Landslide Susceptibility Mapping in Recently Deglaciated Terrain, Glacier Bay, Alaska

Areas of high submarine landslide susceptibility in Glacier Bay, Alaska, correlate with regions of significant sediment input and steep fjords, posing potential tsunami risks. The study quantified and mapped over 7,000 submarine landslides using multibeam-sonar data and historical glacial extent maps, filtering them by size to account for DEM resolution limitations. It found a positive correlation between landslide concentration and deglaciation age, indicating higher susceptibility in older deglaciated areas. The map integrates three components: age-adjusted landslide concentration, slope angle, and geomorphology, identifying high-risk zones that align with sediment-rich locations and active submarine fans and deltas.

Avdievitch, N. N., & Coe, J. A. (2022). Submarine Landslide Susceptibility Mapping in Recently Deglaciated Terrain, Glacier Bay, Alaska. Frontiers in Earth Science, 10. https://doi.org/10.3389/feart.2022.821188