M2.5 : 8.38 m
M3.0 : 26.6 m
M3.5 : 1.43 h
M4.0 : 4.59 h
M4.5 : 14.7 h
M5.0 : 1.97 d
M5.5 : 6.35 d
M6.0 : 20.4 d
M6.5 : 65.6 d
M7.0 : 211 d
M7.5 : 1.86 y
M8.0 : 5.97 y
M8.5 : 19.2 y
M9.0 : 61.7 y
M9.5 : 198 y
M10.0 : 637 y
Based on 56,005 events. Largest M9.1
n = Events per year with magnitude >= M
M <= 10.0
log10(n) = 7.34 - 1.014*M