Passive seismic interferometry is used to image or monitor subsurface structures in various areas. The
principle of seismic interferometry or Green’s function retrieval is that the impulse response between
two receivers is constructed by crosscorrelation of wavefields recorded at these receivers. In this
study, we use passive seismic interferometry to investigate the structural health of earthen dams and
embankments. Since an active seismic energy source can affect the dam’s or embankment’s structural
stability, passive seismic interferometry is often used for structural stability and health investigations.
In earthen dam stability investigations, passive seismic interferometry can be applied to obtain the Swave
velocity and indirectly determine the presence of erosion caused by water infiltration. In this
study, we constructed an S-wave velocity model using passive seismic interferometry to investigate
the stability of an earthen dam. Comparison of the results of the passive seismic interferometry with
those of the electrical resistivity exploration and the active multichannel analysis of surface waves
(MASW) exploration shows that the trend of S-wave velocity changes from passive seismic is similar
that of the electrical resistivity and MASW method.