Earthquake Wave Classification and Generation

This solution analyzes the two statements regarding earthquake waves.

Statement I Analysis: Wave Types

Earthquake waves, also known as seismic waves, are indeed classified into two main categories:

• Body Waves: These waves travel through the Earth's interior. They include Primary (P) waves and Secondary (S) waves.
• Surface Waves: These waves travel along the Earth's surface. They are generated when body waves reach the surface and include Love waves and Rayleigh waves.

Therefore, Statement I is correct.

Statement II Analysis: Wave Generation

Body waves (P and S waves) originating from the earthquake's focus propagate outwards. As these waves encounter the boundary between the Earth's interior and the surface, they interact with the overlying rocks.

This interaction causes the energy of the body waves to be converted into surface waves, which then propagate along the surface, often causing the most damage during an earthquake.

Therefore, Statement II is also correct.

Conclusion

Since both Statement I (classifying waves into body and surface types) and Statement II (explaining the generation of surface waves from body waves) are accurate descriptions of seismic phenomena, both statements are correct.