M2.5 : 14.4 h
M3.0 : 1.63 d
M3.5 : 4.45 d
M4.0 : 12.1 d
M4.5 : 33.1 d
M5.0 : 90.3 d
M5.5 : 246 d
M6.0 : 1.84 y
M6.5 : 5.01 y
M7.0 : 13.7 y
M7.5 : 37.7 y
M8.0 : 102 y
M8.5 : 277 y
M9.0 : 756 y
Based on 1,171 events. Largest M7.6
n = Events per year with magnitude >= M
M <= 9.0
log10(n) = 4.96 - 0.871*M