Spherical harmonic expansion of the Earth's crustal thickness up to degree and order 30
The knowledge of the depth of the Mohorovičic' discontinuity (Moho) is important for investigating the 3-D structure of the Earth's interior, since the variations in the crustal thickness can significantly affect geophysical observations made at the Earth's surface. In this paper, the information about the topography of the crust-mantle boundary is compiled from various sources and the crustal thickness is represented in a spherical harmonic expansion up to degree and order 30.
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