Earthquakes Flashcards
What is an earthquake
An eq is a sudden movement and shaking of the earth
How do eq occur
It’s occur by the movement of the plates in the earth’s crust eg. Plates colliding and sliding past each other.
What happens when plates move?
The rock suddenly breaks and slips along a crack called the fault line
What’s a fault line
A crack in the earth
What is a focus
A focus is a point inside the earths crust where the earthquake starts
What is an epicentre ?
An epicentre is is directly above the focus on the earths surface. Most damage is done here
What is tremor?
A tremor is a shock wave coming out from the focus
What is an aftershock?
Mini earthquake after the main eq
Where do eq happen?
Pacific ring of fire , Himalayan and the Mediterranean.
What measure the strength of an eq?
The Richter scale
What is the definition of magnitude
Strength
What does 0-4 mean on the Richter scale
Very little damaged caused
How much damage does 6.0 on the Richter scale
Major damage
What does 7.0 and above mean on the Richter scale
Major damage over a large area .
Where does the Richter scale go from
0-10
