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question 1 10 pts earthquakes generate two types of body waves. using t…

Question

question 1 10 pts earthquakes generate two types of body waves. using the resources provided, discuss the two types. in your discussion, include action of the waves (3pts), relative speeds of the waves (3pts), and which wave causes the most damage (3pts). one point will be awarded for proper grammar and punctuation.

Explanation:

Brief Explanations

The two body waves from earthquakes are P - waves (primary) and S - waves (secondary).

  • Action of the waves:
  • P - waves are compressional (longitudinal), pushing and pulling rock particles parallel to the wave’s direction (like the top diagram’s compressions/dilations).
  • S - waves are shear (transverse), moving rock particles perpendicular to the wave’s direction (like the bottom diagram’s up - down/side - to - side motion, causing the wavy shape).
  • Relative speeds: P - waves travel faster (about 6 - 7 km/s in the crust), being the first to arrive. S - waves are slower (about 3 - 4 km/s in the crust), arriving after P - waves.
  • Damage caused: S - waves cause more damage. Their transverse motion shakes structures more violently, and they also contribute to ground rupture and building collapse more significantly than P - waves, which mainly cause less destructive compressive shaking.

Proper grammar and punctuation are used throughout this discussion.

Answer:

The two body waves from earthquakes are P - waves (primary) and S - waves (secondary).

Action of the waves:
  • P - waves (compressional/longitudinal) push and pull rock particles parallel to the wave’s direction (similar to the compressions and dilations in the top diagram).
  • S - waves (shear/transverse) move rock particles perpendicular to the wave’s direction (causing the wavy deformation seen in the bottom diagram).
Relative speeds:

P - waves travel faster (≈6 - 7 km/s in the crust), arriving first. S - waves are slower (≈3 - 4 km/s in the crust), arriving after P - waves.

Damage caused:

S - waves cause the most damage. Their transverse motion shakes structures violently, contributing more to ground rupture and building collapse compared to P - waves’ less destructive compressive shaking.