Is this an area of West Virginia where coal mining has taken place? Land slides have been known to happen in such areas,
as the ground settles and old mine tunnels are subsiding.
No, this is just east of I-64 east of Huntington. Having lived in that area, it looks like the cause is poorly executed cut and fill site prep, compromised by rain and gravity over the years.
May be a contributing factor, not a lot of flat ground in WV. They generally have to move a great deal of rock and dirt to build on. Just the way it is.
See post 10! Also the geology there is shale-sandstone-shale etc. When exposed by construction, road cuts etc. over time
can become unstable. Add as in post 10 says this stuff happens.