The velocities of seismic waves traveling from earthquake foci ________.
A)are uniform throughout all layers of Earth
B)decrease at a constant rate with depth
C)increase at a constant rate with depth
D)generally increase with depth,but occasionally make abrupt jumps

Question

Quizplus · Accepted Answer

The best choice is D because seismic waves generally increase with depth but occasionally make abrupt jumps. This phenomenon is attributed to changes in the density and composition of the materials they pass through, which affect the speed and direction of the waves.

The Velocities of Seismic Waves Traveling from Earthquake Foci ________