Question

1. what type(s) of wave originates at focus?

primary wave
secondary wave
surface wave
primary and secondary wave
primary, secondary, and surface wave

1. what type(s) of wave is the fastest to the recording station?

primary wave
secondary wave
surface wave
primary and secondary wave
primary, secondary, and surface wave

Explanation:

For question 9: All seismic waves (Primary, Secondary, Surface) originate from the focus (hypocenter) of an earthquake, where the rock rupture first occurs.
For question 10: Primary (P) waves are compressional waves that travel through solid, liquid, and gas media, making them the fastest seismic waves, arriving at recording stations before S and surface waves.

Answer:

1. Primary, Secondary, and Surface Wave
2. Primary Wave