Erosion of a young volcanic cone: a case study at Ahmanilix, Okmok Volcano, Alaska

Erosion of a young volcanic cone: a case study at Ahmanilix, Okmok Volcano, Alaska American Geophysical Union 12/11/2024 10572310 Daniel OrejuelaJasper BaurEinat LevFrank Oliver NitscheTerry A PlankConor Bacon 250 meters tall andcharacterized by dramatic gullies formed by the harsh wind, snow and rain conditions typical ofthe Aleutians. We usd photogrammetry to create 3D models of Ahmanilix using aerialphotographic surveys taken from a helicopter in 2021, 2022, 2023 and 2024. We utilize AgisoftMetashape to build point clouds, Cloud Compare to align the point clouds and build rasterDigital Elevation Models (DEMs), and QGIS and Python to visualize and analyze theseproducts. By subtracting DEM rasters we quantify year-to-year erosion. We compare ourresults with erosion rates estimated from satellite observations (Dai et al., 2020), identifyregions dominated by erosion or deposition and correlate them with slopes and cinderlithology. Our observations can be extended to other cinder cones and help predict theirgeomorphological evolution.]]>