Question

Which one of the scales of measurement refers to tornado severity and damage?
1. Saffir-Simpson scale
2. Beaufort scale
3. Fujita scale
4. Richter scale

Answer 1

Correct Answer - Option 3 : Fujita scale

Fujita scale of measurement refers to tornado severity and damage.

Fujita scale:

• It is a  scale used to assess the severity and the damage caused by Tornado.
• It was devised by T. Theodore Fujita in the late 1960s.
• The scale measures the severity on the basis of the wind velocity and the damage done by the tornado.

Scale	Wind speed estimate		Potential damage
	mph	km/h
F0	40-72	64-116	Light damage. Some damage to chimneys; branches broke off trees; shallow-rooted trees pushed over; sign boards damaged.
F1	73–112	117–180	Moderate damage. The lower limit is the beginning of hurricane wind speed; peels surface off roofs; mobile homes pushed off foundations or overturned; moving vehicles pushed off the roads; attached garages may be destroyed.
F2	113–157	181–253	Significant damage. Roofs tore off frame houses; mobile homes demolished; boxcars overturned; large trees snapped or uprooted; high-rise windows broken and blown-in; light-object missiles generated.
F3	158–206	254–332	Severe damage. Roofs and some walls torn off well-constructed houses; trains overturned; most trees in forests uprooted; heavy cars lifted off the ground and thrown.
F4	207–260	333–418	Devastating damage. Well-constructed houses levelled; structures with weak foundations blown away some distance; cars were thrown and large missiles generated.
F5	261–318	419–512	Incredible damage. Strong frame houses lifted off foundations and carried considerable distances to disintegrate; automobile sized missiles fly through the air farther than 100 meters (110 yards); trees debarked; steel-reinforced concrete structures badly damaged and skyscrapers toppled

• The Enhanced F-scale was implemented in February 2007.
• In the Fujita scale, the wind speed is not measured rather it is estimated after the tornado is over. 
• Primarily the tornado can be categorized into three, weak tornado, strong tornado, and violent tornado.