Hypothetical landslide failure extents for hazard assessment, Barry Arm, western Prince William Sound, Alaska ...

• Main Authors: Andrew L Collins, Katherine Katy R Barnhart
• Format: Dataset
• Language: unknown
• Published: U.S. Geological Survey 2023
• Subjects: geomorphology; marine geology; glacier; Alaska
• Online Access: https://dx.doi.org/10.5066/p9as1ikb; https://www.sciencebase.gov/catalog/item/64c40249d34e70357a33d3f0

This data release contains extent shapefiles for 16 hypothetical slope failure scenarios for a landslide complex at Barry Arm, western Prince William Sound, Alaska. The landslide is likely active due to debuttressing from the retreat of Barry Glacier (Dai and others, 2020) and sits above Barry Arm, posing a tsunami risk in the event of slope failure (Barnhart and others, 2021). Since discovery of the landslide by a citizen scientist in 2020, kinematic structural elements have been mapped (Coe and others, 2020) and ground-based and satellite synthetic aperture radar (SAR) have been used to track ongoing movement at a high spatial resolution (Schaefer and others, 2020; Schaefer and others, 2022). These efforts have revealed complex, zonal movement; the mechanisms of which remain unknown. To support hazard assessment, we constructed 16 different failure scenarios. The scenarios are all based on structural elements and/or remotely sensed evidence of motion but are also intended to cover a range of shapes and ...