M2.5 : 14.8 m
M3.0 : 55.1 m
M3.5 : 3.40 h
M4.0 : 12.6 h
M4.5 : 1.95 d
M5.0 : 7.23 d
M5.5 : 26.8 d
M6.0 : 99.3 d
M6.5 : 1.01 y
M7.0 : 3.74 y
M7.5 : 13.9 y
M8.0 : 51.4 y
M8.5 : 191 y
M9.0 : 706 y
M9.5 : 2620 y
Based on 18,313 events. Largest M8.3
n = Events per year with magnitude >= M
M <= 9.5
log10(n) = 7.39 - 1.138*M