EARTHQUAKE WAVES

Question 1

2 types of earthquake wave category

Answer 1

BODY WAVE
primary wave
secondary waves

SURFACE WAVE
rayleigh
love

Question 2

primary wave

Answer 2

non-dispersive, fast waves from the focus, due to short wave length

travel through solid/liquid

Cause bedrock to compression in same direction wave travelling, they are the fastest (8km/sec) and first to reach the surface.

Question 3

secondary wave

Answer 3

non-dispersive, slower waves from focus due to their longer wavelength (50% slower than P waves – approx. 4km/sec).

Only travel through solids (crust and mantle) causing bedrock to move perpendicular to direction wave travels

Do more damage than P waves.

Question 4

rayleigh

Answer 4

dispersive, fast wave moving surface in an elliptical motion in the direction that the wave is moving

shake earth’s crust away from epicentre

Question 5

seismic waves

Answer 5

the shifting of rock in an earthquake causing vibrations

Question 6

love wave

Answer 6

dispersive, fast wave moving surface transverse perpendicular from main propagation of earthquake in an entirely horizontal motion

travel velocity of 4km/s

shake earth’s crust away from epicentre