M2.5 : 20.7 m
M3.0 : 1.07 h
M3.5 : 3.33 h
M4.0 : 10.3 h
M4.5 : 1.34 d
M5.0 : 4.16 d
M5.5 : 12.9 d
M6.0 : 40.2 d
M6.5 : 125 d
M7.0 : 1.06 y
M7.5 : 3.30 y
M8.0 : 10.3 y
M8.5 : 31.9 y
M9.0 : 99.0 y
M9.5 : 308 y
Based on 33,228 events. Largest M8.3
n = Events per year with magnitude >= M
M <= 9.5
log10(n) = 6.87 - 0.985*M