National Health-Oriented Hazard Assessment in Iran Based on the First Priority for Action in Sendai Framework for Disaster Risk Reduction 2015–2030

Table 2

Ranking the hazard according to its frequency.

Rank of frequency	Definition
1	None in the last 20 years
2	Once in the last 20 years
3	Two or three times in the last 20 years
4	Four or five times in the last 20 years
5	More than five times in the last 20 years