We extend the work of a previous paper to give a long‐wavelength approximation for elastic wave scattering by an elliptical flat crack. Explicit formulas for the far‐field scattered amplitudes in this approximation are given for various experimental configurations. These formulas are then applied to give a simple inversion procedure. The orientation and eccentricity of the crack are readily determined from unnormalized scattering data. The size may be determined from an absolute intensity measurement.