M2.5 : 5.92 m
M3.0 : 21.0 m
M3.5 : 1.24 h
M4.0 : 4.41 h
M4.5 : 15.7 h
M5.0 : 2.32 d
M5.5 : 8.23 d
M6.0 : 29.2 d
M6.5 : 104 d
M7.0 : 1.01 y
M7.5 : 3.58 y
M8.0 : 12.7 y
M8.5 : 45.1 y
M9.0 : 160 y
M9.5 : 568 y
Based on 46,346 events. Largest M8.3
n = Events per year with magnitude >= M
M <= 9.5
log10(n) = 7.70 - 1.100*M