Inventory of landslides triggered by an extreme rainfall event in Marche-Umbria, Italy, on 15 September 2022

This paper describes the event landslide inventory map produced to record the ground effects of the extreme rainfall event that hit Umbria-Marche, central Italy, on 15th September 2022. The rainfall event hit an area of ~5,000 km2, with peak rainfall intensities of 419 mm in 9 hours, an exceptionally intense rainfall for this area. The event generated widespread flooding also outside the area affected by rainfall. The rainfall event produced widespread landslides across an area of nearly 1,000 km2. As a direct consequence of floods and landslides, many roads were interrupted and extensive damages were recorded to structures and infrastructures. The landslide inventory presented is the result of an extensive reconnaissance field survey covering a large neighbourhood of the area affected by the highest rainfall intensity. The inventory covers an area of 550 km2 and includes 1,687 landslides, corresponding to an average density of about 3.1 landslides per square kilometre. Landslide size (Landslide Area, AL in m2) is in the range ~1m2 A polygon shapefile of the AOI A polygon shapefile of the raw inventory A point shapefile of the raw inventory A polygon shapefile of the final inventory A point shapefile of the final inventory This dataset consistently supports the scale of 1:15 000. As a consequence, all polygons smaller than 225 m2 (i.e. a square of 1 mm per side in the map) in the raw data polygon layer were transformed into points because their size was too small to be represented as polygons at 1:15000 scale. Copyright: CC BY 4.0