- Surface waves are generated when the body waves interact with the surface rocks. As they move along the surface and the direction of the vibration is perpendicular to the propagation, these waves are considered as the most damaging one.
THE EMERGENCE OF SHADOW ZONE
- Earthquake waves get recorded in seismographs located at far off locations. However, there exist some specific areas where the waves are not reported. Such a zone is called the ‘shadow zone’.
- Seismographs located at any distance within 105° from the epicenter, recorded the arrival of both P and S-waves.
- Seismographs located beyond 145° from the epi-centre record the arrival of P-waves, but not that of S-waves.
- Thus, a zone between 105° and 145° from epicenter was identified as the shadow zone for both the types of waves.
Any suggestions or correction in this article - please click here