M2.5 : 14.1 m
M3.0 : 43.6 m
M3.5 : 2.25 h
M4.0 : 6.95 h
M4.5 : 21.5 h
M5.0 : 2.77 d
M5.5 : 8.55 d
M6.0 : 26.4 d
M6.5 : 81.7 d
M7.0 : 253 d
M7.5 : 2.14 y
M8.0 : 6.61 y
M8.5 : 20.4 y
M9.0 : 63.1 y
M9.5 : 195 y
M10.0 : 603 y
Based on 32,467 events. Largest M9.1
n = Events per year with magnitude >= M
M <= 10.0
log10(n) = 7.02 - 0.980*M