The Mohorovicic discontinuity was discovered by observing
A)earthquake movement at Earth's surface.
B)seismograms of an earthquake.
C)changes in rock density.
D)all of these

Question

Quizplus · Accepted Answer

The Mohorovicic discontinuity (Moho) was discovered by Andrija Mohorovicic in 1909 by studying the seismograms of an earthquake. He found that seismic waves passing through the Earth's crust and into the mantle underwent a sudden increase in velocity and a change in direction. This suggested the presence of a boundary layer between the Earth's crust and mantle, known as the Moho.

The Mohorovicic Discontinuity Was Discovered by Observing