Earthquake moment is defined as M0 = µDA, where µ is the shear modulus, D is the average displacement on the fault, and A is the fault area that slipped. The moment of the 2004 Sumatra-Andaman...

Earthquake moment is defined as M0 = µDA, where µ is the shear modulus,

D is the average displacement on the fault, and A is the fault area that slipped.

The moment of the 2004 Sumatra-Andaman earthquake has been estimated to be

about 1.0 × 1023 N m. Assuming that the fault is horizontal, crudely estimate the

slip area from the image shown in Figure 1.9. Assuming that the shear modulus

µ = 3.0 × 1010 N/m2, then compute the average displacement on the fault.