Earthquake Flashcards
1
Q
Earthquake
A
- sudden shaking of the earth’s
interior - Earthquakes are associated with
faults, when a fault suddenly
moves, an earthquake occurs
2
Q
Fault
A
- Weak point in the tectonic plate where pressure within the crust is released
3
Q
Fault plane
A
the surface along where the plate breaks or slides
4
Q
Fault Trace
A
the visible disturbance on the surface, also referred as fault line
5
Q
Hanging wall
A
the material that rest above the fault
6
Q
Foot wall
A
the material that rest below the fault
7
Q
Types of Faults
A
Dip-Slip
- normal
-reverse
Strike-slip
-left lateral
-right lateral
8
Q
Dip Slip Fault
A
This occurs when the hanging wall
slides up and down with respect to
the footwall
9
Q
Normal Fault
A
-hanging wall moves down
- pulling apart or extensional
10
Q
Reverse Fault
A
- Hanging wall moves up
- compressional/push toward each other
11
Q
Strike slip
A
- motion is horizontal or sideways
- transcurrent fault
12
Q
Active fault
A
move one or more times in the last 10000 years
13
Q
Inactive fault
A
did not move for millions of years
14
Q
Focus
A
where earthquake begins
15
Q
Epicenter
A
point in the ground directly above the focus
