50 500 100 200
9 18 12 15
0 to 6 0 to 36 0 to 12 0 to 24
Richter Scale Beaufort Scale Mercalli Scale deciBel Scale
Moderate Breeze Violent Storm Strong Breeze Gale
Light Air Calm Strong Breeze Hurricane
Calm Hurricane Strong Gale Storm
10 100 30 50
Wind Speed Humidity Air Pressure Sea Conditions