Internal structure of the great tumulus of Apollonia as revealed by seismic tomography

We investigate the tumulus of Apollonia using the NSTomo3D seismic tomography software. Results reveal P-wave velocities of >850 m/s at the perimeter and <650 m/s in the middle. High velocities are associated with travertine rocks that were used as building materials. Low velocities correspond to unconsolidated sediments used as filling material. Several structures revealed that are of potential archaeological interest