Natural disaster, rapid onset – (A disaster that is triggered by an instantaneous shock.The impact of this disaster may
unfold over the medium- or long-term.An earthquake is a prime example) la catastrophe naturelle- l'évolution rapide

Natural disaster, slow onset – (A disaster event that unfolds alongside and within development processes. The hazard can be felt as an ongoing stress for many days,months or even years.Drought is a prime example.) catastrophe naturelle, l'évolution lente

Natural Hazards – (Natural processes or phenomena occurring in the biosphere that may constitute a damaging event.) des risques naturels