The slope forming material of shallow depth loses its cohesion due to high percolation of water during heavy rainfall leading to failure under the influence of gravity due to the high angle of the slope.
Tep, Y. and Kumar, A. (2018); MacroScale (1:50,000) Landslide Susceptibility Mapping in Toposheet nos. 83C/16 and 83H/1 in  Dima Hasao and Cachar districts in Asam and East Jaintia hills  District in  Meghalaya and West and Central MNipur district in MNi
The dimension of the landslide is not threatening however slope stability measures should be applied to arrest further failure.
Kayang1
NH54
Toe support for the affected slope through construction of strong RCC retaining wall with sufficient weep holes founded on sound substratum. Construction of concrete road side drains with sufficient width to allow the passage of surface runoff.
Oversaturation of slope forming material and increase in local pore water pressure. Loose of toe support due to extensive slope cut along NH4.