Table 1.

Regressions of rupture (RW) width and moment magnitude (M) (Wells & Coppersmith 1994)

Coefficients
EquationSlip typeabMagnitude range
Embedded ImageStrike-slip3.802.594.8–8.1
Reverse4.371.954.8–7.6
Normal4.042.115.2–7.3
Embedded ImageStrike-slip−0.760.274.8–8.1
Reverse−1.610.414.8–7.6
Normal−1.140.355.2–7.3
  • The regressions are derived using a worldwide database for 421 historical earthquakes.