Earthquake Hazards Flashcards
Where Plates Meet, _______________ Occur.
Earthquakes.
Earthquakes Occur at all _______ Types of Plate Boundary.
Three.
Earthquakes are Caused by __________ that Builds Up All Three Types of Plate Boundary.
Tension.
What happens when an Earthquake Occurs at a Convergent Boundary?
Tension Builds Up when One Plate gets Stuck as it’s Moving Down Past the Other into the Mantle.
What happens when an Earthquake Occurs at a Divergent Boundary?
Tension Builds Along Cracks Within the Plates as they Move Away from Each Other.
What happens when an Earthquake Occurs at a Conservative Boundary?
Tension Builds Up when Plates that are Grinding Past Each Other get Stuck.
With Earthquakes, Plates Eventually Jerk Past Each Other Sending out ________ ________ (Vibrations). These Vibrations are the Earthquake.
Shock…Waves…
Earthquakes are Measured Using the Moment _____________ Scale, which Measures the __________ Released by an Earthquake.
Magnitude…Energy…
The ________ of an Earthquake is the Point in the Earth where the Earthquake Starts. This can be at the Earth’s Surface or Anywhere Up to ______KM Below the Surface.
Focus…700…
_______-Focus Earthquakes are Caused by Crust that has been Previously been Subducted into the Mantle Moving towards the Centre of the Earth, Heating Up or ______________. They have a Focus Between ____KM and 700KM Below the Earth’s Surface.
Deep…Decomposing…70…
__________-Focus Earthquakes are Caused by Tectonic Plates Moving at or Near the Surface. They have a Focus Between 0KM and ____KM Below the Earth’s Surface.
Shallow…70…
In General, Deeper Earthquakes do Less _________ at the Surface than Shallower Earthquakes.
Damage.
Shock Waves from Deeper Earthquakes have to _________ through More Rock to Reach the Surface, Reducing their _______ when they Reach the Surface.
Travel…Power…
Earthquakes can Cause ____________.
Tsunamis.
Underwater Earthquakes Cause the ________ to Move, Displacing Water. Waves Spread out from the ____________ of the Earthquake.
Seabed…Epicentre…
