Seismic Flashcards
1
Q
Crust
A
25-50k, less dense, outer layer
2
Q
mantle
A
magma (liquid)
3
Q
Outer core
A
liquid metal area, currents
4
Q
inner core
A
solid metal, high degrees + pressure
5
Q
Primary seismic wave
A
long, fastest, minute, initial tremors, all mediums
6
Q
Secondary seismic wave
A
trans, slower, major tremors, solids
7
Q
Surface waves
A
slowest, crust, most damage
8
Q
Earthquake
A
generated in crust as shock waves
9
Q
How to detect an earthquake
A
seismometer
10
Q
Focus
A
point of earthquake origin
11
Q
Epicentre
A
point on surface closest to focus
12
Q
Deeper into earth . . .
A
Denser, more refraction
13
Q
Where do S not pass?
A
the outer core = shadow zone
14
Q
Why do P cut into S shadow zone?
A
refract across boundaries
15
Q
How do we know the outer core is liquid?
A
no tremors detected in areas
