Earthquake lesson 1 Flashcards
the vibration of earth caused by the rapid release of energy
Earthquake
A broken segment of a litosphere
Plate
Two plates collides with each other
Convergent
two plates moving away
Divergent
Two plates slide past with each other
Transform
The origin of the earthquake
Focus
Force acting on some area
Stress
Type of stress that pulls the rock apart
Tensional stress
Type of stress that squeezes the rock
Compressional stress
Type of stress that moves horizontally
Shear stress
A break or fracture on a rock
Fault
A fault that has a possibility to move again in the future
Active fault
No fault movement after past million years
Inactiver fault
0-70km focus earthquake
Shallow focus earthquake
70 - 700km earthquake
Deep focus earthquake
A block of crust below the fault
Footwall
A block of crust above the fault
Hanging wall
Normal fault causes what?
Valley
Reverse fault causes what?
Mountains
A strike-slip fault causes what?
Ridge
Trace of fault on the surface of the earth
Fault line
It is the energy released
Magnitude
The effects on people or surroundings
Intensity
Change in shape or size
Strain
Depression on the sea floor
Trench
giant wave/tsunami
Seiches
sudden movement along faults and plate boundaries
Tectonic earthquake
caused by the movement of magma beneath the surface of the earth
Volcanic earthquake
