How and Where Earthquakes Occur (Grade 10 NSC Matric Geography): Flashcards
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Definition of earthquakes
Definition of earthquakes
Powerful & violent movements in Earth's crust
Focus (earthquake term)
Focus (earthquake term)
Point underground where earthquake movement begins
Epicentre (earthquake term)
Epicentre (earthquake term)
Point on surface directly above the focus
Seismic waves
Seismic waves
Vibrations that travel through Earth's crust during earthquake
Tsunami
Tsunami
Massive wave formed when earthquake occurs beneath ocean floor
Seismic waves that cause most damage
Seismic waves that cause most damage
L waves (Love waves)
Where most earthquakes occur
Where most earthquakes occur
Beneath the ocean floor
Effect of shallow focus earthquakes
Effect of shallow focus earthquakes
Cause more severe shaking and damage
Pacific Ring of Fire
Pacific Ring of Fire
Highly active earthquake & volcanic zone around Pacific Ocean
Earthquake deaths vs other natural disasters
Earthquake deaths vs other natural disasters
Responsible for more deaths than any other type