The area experienced heavy rainfall resulting in significant increase in discharge in  Ramganga river which eroded and  cut the toe on the right bank. Upslope debris mass was also saturated and lost its shear strength and ultimately failed.

An Interim Report on Preliminary  Geological  Slope Stability Assessment of the Recent Disaster Affected Areas in Parts of Chamoli District, Uttarakhand by Bhupendra Singh, Bhupender Singh, Ajay Kumar and Arindam Roy, Senior Geologists, M-IV, NR GSI Dehr
UK_CHA_NH_ 038
Agarchatti on Gairsain –Almora road NH-87E
Slope reduction by benching, sealing of cracks, vegetation turfing.
Heavy rainfall in the area resulted in increase in discharge of Ramganga River which engeged in toe cutting, rainfall also saturated and reduced shear stregth of slope debris.