M2.5 : 10.7 h
M3.0 : 1.22 d
M3.5 : 3.36 d
M4.0 : 9.24 d
M4.5 : 25.4 d
M5.0 : 69.9 d
M5.5 : 192 d
M6.0 : 1.45 y
M6.5 : 3.98 y
M7.0 : 11.0 y
M7.5 : 30.1 y
M8.0 : 82.9 y
M8.5 : 228 y
M9.0 : 627 y
Based on 1,627 events. Largest M7.1
n = Events per year with magnitude >= M
M <= 9.0
log10(n) = 5.11 - 0.879*M