Steep Natual slope and continuous rainfall led to toe erosion by high river current. Human activity was also the other factor for the landslide 

An interim report on Preliminary slope stability assessment of recent disaster affected areas of Pithoragarh District, Uttarakhand by A Bishwapriya, Suptg. Geologist, M V Dhakate and P K Gajbaiye, Sr Geologist, M IV, NR,Dehradun (LHZ/NR/UPUK/2013/056)
Active slide
UK/Pith/ Munsyari-Jauljibi/LS/0037
State Highway
Flood protection wall, re-grading of the profile to mild angle in the form of slopes and benches, protection of slopes by geo-jute/geo-grid, stepped retaining walls with weep holes towards hill side, training of the nala and proper drainage arrangements
Presence of loose and unconsolidated material, flooding of the river with high current and toe erosion in soil. Also the development of the pore pressure and reduction of the shear strength of the material due to saturation by water percolation, gully er