Regions where seismometers do not record P and/or S waves are called

Question

Quizplus · Accepted Answer

Shadow zones are regions on Earth where seismometers cannot detect certain seismic waves, including P waves and S waves, due to the nature of their propagation through the Earth's interior. This phenomenon is caused by the refractive bending and absorption of waves that occurs in the different layers of the Earth's interior. Other choices may also be related to earthquake activity, but they do not specifically refer to the areas where seismometers cannot record certain types of seismic waves.

Regions Where Seismometers Do Not Record P And/or S Waves