Earthquake Definitions Flashcards
0
Q
Epicentre
A
Point directly above focus on surface
1
Q
Focus
A
Deep below crust where earthquake begins
2
Q
Seismic waves
A
Waves of energy passing through crust from focus to surface. Move out in concentric circles
They are P-Primary and S-Secondary waves
3
Q
L(Long) Waves
A
P and S waves when they reach the surface and spread from epicenter
4
Q
Earthquake
A
Caused by sudden slip on fault line. Produces vibrations called seismic waves
