M2.5 : 3.83 m
M3.0 : 13.6 m
M3.5 : 48.7 m
M4.0 : 2.89 h
M4.5 : 10.3 h
M5.0 : 1.53 d
M5.5 : 5.46 d
M6.0 : 19.5 d
M6.5 : 69.5 d
M7.0 : 248 d
M7.5 : 2.42 y
M8.0 : 8.62 y
M8.5 : 30.8 y
M9.0 : 110 y
M9.5 : 391 y
Based on 72,622 events. Largest M8.1
n = Events per year with magnitude >= M
M <= 9.5
log10(n) = 7.90 - 1.104*M