M2.5 : 32.1 m
M3.0 : 1.76 h
M3.5 : 5.79 h
M4.0 : 19.0 h
M4.5 : 2.61 d
M5.0 : 8.59 d
M5.5 : 28.2 d
M6.0 : 92.9 d
M6.5 : 306 d
M7.0 : 2.75 y
M7.5 : 9.05 y
M8.0 : 29.8 y
M8.5 : 97.9 y
M9.0 : 322 y
Based on 12,198 events. Largest M8.1
n = Events per year with magnitude >= M
M <= 9.0
log10(n) = 6.80 - 1.034*M