M2.5 : 32.0 m
M3.0 : 1.63 h
M3.5 : 4.99 h
M4.0 : 15.3 h
M4.5 : 1.95 d
M5.0 : 5.96 d
M5.5 : 18.3 d
M6.0 : 55.9 d
M6.5 : 171 d
M7.0 : 1.43 y
M7.5 : 4.39 y
M8.0 : 13.4 y
M8.5 : 41.1 y
M9.0 : 126 y
M9.5 : 385 y
M10.0 : 1180 y
Based on 752,159 events. Largest M9.1
n = Events per year with magnitude >= M
M <= 10.0
log10(n) = 6.65 - 0.972*M