早在本世纪初,南斯拉夫地球物理学家莫霍洛维奇就首先测得大陆地壳内的地震波传播速度。他发现地震波在地表以下平均大约33公里处波速发生显著变化,因而确定了地壳和地幔的分界面,这就是人们所熟知的莫霍面。地壳的平均厚度为约33公里长期被人们所接受。 As early as the beginning of this century, the Yugoslav geophysicist Mojerovic first measured the propagation velocity of seismic waves in the continental crust. He found that the seismic waves changed significantly at an average velocity of about 33 km below the surface, thus defining the interface between the crust and the mantle, which is known as the Moho. The average crust thickness of about 33 km long been accepted.