GEOLOGY

Detailed explanation-1: -The energy radiates outward from the fault in all directions in the form of seismic waves like ripples on a pond. The seismic waves shake the earth as they move through it, and when the waves reach the earth’s surface, they shake the ground and anything on it, like our houses and us!

Detailed explanation-2: -Figure 18.3: When the two blocks on either side of a fault plane suddenly slip, the energy travels outward from the focus as intense vibrations called seismic waves. These waves cause the ground near the epicenter to shake violently.

Detailed explanation-3: -Seismic waves are the energy from earthquakes. Seismic waves move outward in all directions away from their source. Each type of seismic wave travels at different speeds in different materials. All seismic waves travel through rock, but not all travel through liquid or gas.

Detailed explanation-4: -Seismic waves generate two types of wave motions: Body waves and surface waves. Body waves move through the interior of the Earth and are made up of P waves (red concentric) and S waves (white concentric lines). Body waves depart the point of origin at the same time, but P waves travel faster than S waves.

Detailed explanation-5: -At farther distances the amplitude of the seismic waves decreases as the energy released by the earthquake spreads throughout a larger volume of Earth. Also with increasing distance from the earthquake, the waves are separated apart in time and dispersed because P, S, and surface waves travel at different speeds.