Comprehensive Inventory of Coseismic Landslides Triggered by the 2023 Kahramanmaraş Earthquakes, Türkiye

Abdüssamet Yılmaz, Hakan Tanyas , Furkan Karabacak, Mehmet Lütfi Süzen, Tolga Gorum

We provide two geospatial inventories covering ~80,000 km² in southern Türkiye for the 6 February 2023 Kahramanmaraş earthquake sequence: (i) a coseismic landslide polygon inventory including 20,270 landslides and (ii) a pre-earthquake geomorphic inventory of pre-existing slope instability including 4,495 landslide polygons. Coseismic landslides were mapped by systematic expert visual interpretation of high-resolution optical pre- and post-event imagery, primarily 0.3 m post-event aerial photographs acquired by the Turkish General Directorate of Mapping. The pre-earthquake inventory was compiled from 5 m DEM-based Red Relief Image Maps. Coseismic landslides were digitized as full-footprint polygons and attributed by movement type (avalanche, slide, fall, flow, lateral spread, complex) and material (earth, debris, rock, rock–debris). The datasets are released to support event-based landslide analyses, model development and benchmarking, cross-event comparison, and future updates or extensions.