M2.5 : 14.0 m
M3.0 : 43.9 m
M3.5 : 2.30 h
M4.0 : 7.24 h
M4.5 : 22.8 h
M5.0 : 2.98 d
M5.5 : 9.38 d
M6.0 : 29.5 d
M6.5 : 92.8 d
M7.0 : 292 d
M7.5 : 2.51 y
M8.0 : 7.90 y
M8.5 : 24.8 y
M9.0 : 78.1 y
M9.5 : 246 y
Based on 32,106 events. Largest M8.1
n = Events per year with magnitude >= M
M <= 9.5
log10(n) = 7.06 - 0.995*M