Abstract
This paper proposes two indices to measure the similarity of seismic waves based on the time-frequency characteristics. One index uses Wigner distribution and it can represent energy misfit of seismic waves on the time-frequency region. The other uses wavelet transform and it allows us to discuss envelope misfit and phase misfit of seismic waves. The performance of the two proposed indices are compared based on the numerical examples. The results indicate that the index using wavelet transform is suitable for similarity estimation of seismic waves in the time frequency domain.
