Significant differences in the intensity of the present-day genetically different geomorphic processes should be taken into account when classifying natural hazards, some catastrophic processes, such as infrequent but extreme (in wave height) storms, and even more so tsunamis, cause damage comparable to that resulting from long-term marine erosion by medium-high waves. Natural-technogenic processes are close in their destructive power over short time interval to anomalous and catastrophic natural phenomena.