M2.5 : 9.13 h
M3.0 : 1.04 d
M3.5 : 2.86 d
M4.0 : 7.83 d
M4.5 : 21.4 d
M5.0 : 58.8 d
M5.5 : 161 d
M6.0 : 1.21 y
M6.5 : 3.31 y
M7.0 : 9.06 y
M7.5 : 24.8 y
M8.0 : 68.0 y
M8.5 : 186 y
M9.0 : 511 y
M9.5 : 1400 y
Based on 16,002 events. Largest M8.2
n = Events per year with magnitude >= M
M <= 9.5
log10(n) = 5.17 - 0.875*M