Following the waves from their focus and recording their travel speed is helpful to determine the structures of Earth's interior. The correct option is C. Seismic waves travel through different materials at different speeds.
When rocks break during plates movements, they generate waves that propagate, moving inside the Earth and on its surface. These are the sysmic waves.
There are three types of waves,
- P waves are the fastest in moving and can be transmitted through different materials, liquid or solid.
- S waves are slower and can not be transmitted through liquid masses.
- Surface waves are the slowest ones.
Due to the difference in the speed, the first recorded waves during an earthquake are the P waves, followed by the S waves, and finally, the surface waves.
The difference in waves' speed is used to determine the location of the earthquake focus and the structures of Earth.
As waves move through different materials, they change their speed. This change leads scientists to know what type of masses they are going through.
Following the waves from earthquake focus and recording their travel speed is helpful to determine the structures of Earth's interior.
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