The zone where the earthquake waves are not observed is called:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Shadow Zone.
The Shadow Zone is the area on Earth’s surface where earthquake waves (specifically seismic waves) are not detected by seismographs after an earthquake. This occurs because S-waves (shear waves) cannot travel through the liquid outer core, and P-waves (primary waves) get refracted when they pass through the core, creating zones where these waves do not reach. The shadow zone provides important evidence about the Earth’s internal structure.