Due to incessant rainfall for about five days the pore water pressure increased and the slope forming material diminished the available shear strength to a point where equilibrium was no longer sustainable in the slope.
Chasie M. &  Theophilus P.K., 2017: Updation of existing landslide inventory of North Eastern region based on the new incidences as and when occurs during the period, Unpubl. GSI progress report for FS 2016-40
Although a subsidiary road, it leads to many villages for trade. Landslide occurred on 22/05/2016 with no past record of slope failure
Haflong – Gunjung slide-1
Near  Gunjung village road section
1. Multiple bench and berm upslope of road bench.
2. Removal of precariously hanging tree to reduce the static loading at the crown.
3. Channeling of surface drainage system and proper maintenance of hill side drain.
Excessive steepening of natural slope without sufficient slope support. Over saturation of weak overburden material due to continuous rainfall in the preceding days and development of local hydrostatic pressure in the weak slope forming material rendered