Snow avalanches (hereafter called avalanches) are rapid mass movements of snow down a hillside or slope occurring in all snow-covered mountain areas worldwide. Avalanches are a major threat to critical infrastructure like water turbine projects, Roads, infrastructure, defense, etc causing delays, disruption and damage. Snow avalanches are a major natural hazard in mountainous areas in winter. Avalanche forecasters greatly rely on avalanche activity data to determine the avalanche hazard since recent avalanche occurrences provide unambiguous information on snow cover instability. Avalanche activity is usually estimated based on visual observations, which are incomplete and impossible at night or when visibility is limited. This often leads to uncertainties in the number and exact timing of avalanches.