An extreme rainfall-induced landslide susceptibility assessment using autoencoder combined with random forest in Shimane Prefecture, Japan

Geoenvironmental Disasters

Table 3 Description and frequency ratio (FR) of geological factors in the study area

Factors	Values	No. of Ls	FR	Factors	Values	No. of Ls	FR
Geological age	Unknown age	22	1.31	Lithology	Felsic plutonic rocks	9	0.93
	Triassic to Jurassic	8	0.41		Gabbro and diorite in accretionary complex	13	1.12
	Present	14	3.09		Higher terrace	27	0.85
	Permian	13	1.53		Lower terrace	16	0.82
	Paleocene to Early Eocene	2	0.36		Mafic plutonic rocks	10	1.50
	Middle to Late Miocene	2	1.37		Marine and non-marine sediments	13	3.94
	Middle to Late Miocene	10	9.15		Non-alkaline felsic volcanic intrusive rocks	2	0.64
	Middle Eocene	1	0.15		Non-alkaline felsic volcanic rocks	0	0
	Late Pleistocene to Holocene	18	1.41		Non-alkaline mafic volcanic rocks	0	0
	Late Pleistocene	0	0		Non-alkaline pyroclastic flow volcanic rocks	0	0
	Late Miocene to Holocene	0	0		Sand dune deposits	0	0
	Late Eocene to Early Oligocene	0	0		Schist	0	0
	Late Cretaceous	0	0		Ultramafic rocks	0	0
	Early to Middle Miocene	0	0		Volcanic debris	0	0
	Early Pleistocene	0	0		Water	0	0
	Early Miocene to Middle Miocene	0	0			0	0