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Retum Period T (yrs) <br />Duration T (min) <br />0.12 <br />5 <br />10 <br />15 <br />30 <br />60 <br />2 <br />0.013 <br />0.020 <br />0.026 <br />0.036 <br />0.046 <br />5 <br />0.044 <br />0.068 <br />0.086 <br />0.119 <br />0.150 <br />10 <br />0.073 <br />0.113 <br />0.143 <br />0.198 <br />0.250 <br />25 <br />0.109 <br />0.169 <br />0.214 <br />0.296 <br />0.375 <br />50 <br />0.145 <br />0.225 <br />0.285 <br />0.395 <br />0.500 <br />100 <br />0.171 <br />0.266 <br />0.337 <br />0.467 <br />0.591 <br />2 <br />0.16 <br />0.12 <br />0.10 <br />0.07 <br />0.05 <br />5 <br />0.52 <br />0.41 <br />0.34 <br />0.24 <br />0.15 <br />10 <br />0.87 <br />0.68 <br />0.57 <br />0.40 <br />0.25 <br />25 <br />1.31 <br />1.01 <br />0.86 <br />0.59 <br />0.38 <br />50 <br />1.74 <br />1.35 <br />1.14 <br />0.79 <br />0.50 <br />100 <br />2.06 <br />1.59 <br />1.35 <br />0.93 <br />0.59 <br />Intensity - I =PR <br />0.29 0.45 0.57 0.79 <br />