Earthquake Flashcards
What is an earthquake
A shock or series of shocks caused by a sudden earth movement
What is the focus
The point in the earths crust where the earthquake occurs
Epicentre
The point on the earths surface directly above the focus, where its effects are felt first
The main belts or lines of earthquakes are
Around the Pacific Ocean
Down the middle of the Atlantic
In a line linking Southern Europe with Eastern Asia
Earthquakes occur
At plate margins because this is where friction occurs and stresses build up as sections of crust move past
Liquefaction
Rock or soil contains water is shaken by an earthquake. The water rises to the surface and turns the soil to liquid mud.
Tsunami
Large wave of sea water, caused by an earthquake under the sea. The shock waves create small on the ocean surface as they move towards shore they become much larger