Event: (E)F0's: (E)F1's: (E)F2's: (E)F3's: (E)F4's: (E)F5's: CALCULATE Relative Frequency Score (RFS) Tom Grazulis Outbreak Intensity Score (OIS) 0 0 Marginal 23 - 44 Minor 45 - 130 Moderate 131 - 238 Significant 239 - 672 Major 673 - 825 Extreme 826 - 2368 Super 2369+ Weak 2-6 Minor 7-10 Significant 11-29 Major 30-79 Devastating 80-119 Historic 120-249 Super 250+