M2.5 : 21.8 m
M3.0 : 1.18 h
M3.5 : 3.87 h
M4.0 : 12.6 h
M4.5 : 1.72 d
M5.0 : 5.62 d
M5.5 : 18.4 d
M6.0 : 60.0 d
M6.5 : 196 d
M7.0 : 1.75 y
M7.5 : 5.72 y
M8.0 : 18.7 y
M8.5 : 61.1 y
M9.0 : 200 y
M9.5 : 652 y
M10.0 : 2130 y
Based on 17,729 events. Largest M9.1
n = Events per year with magnitude >= M
M <= 10.0
log10(n) = 6.95 - 1.028*M