Earthquakes Flashcards
(37 cards)
How are earthquakes developed?
The breakage of rocks along a fault
Can we predict earthquakes?
No
Where do most earthquakes develop?
Concentrated along plate boundaries.
The edge of oceanic and continental plates
Where are they at depth?
Subduction zone
What kind of volcanoes do the Japanese Islands have?
Strato-volcanoes with felsic and intermediate lava
What does the blue circles mean on a map illustrating earthquakes?
Shallow; does the most damage and will feel
What does the green circles mean on a map illustrating earthquakes?
Intermediate
What does the red circles mean on a map illustrating earthquakes?
deep
When an earthquake occurs what is being released?
energy waves
What’s the focus/ hypocenter?
The location where rocks actually break
What’s the epicenter?
The point on the ground above the focus
What does the prefix epi- mean?
on top of
Where does the energy come from in moving plate tectonics?
the core
What are P (primary)- wave?
Waves that travel through solids and liquids.
What are S (shake/ secondary) waves?
Waves that travel only through solids.
How do P- waves move?
Left to Right
How do S-waves move?
Up and Down
What are surface waves?
Waves that travel on the surface
Which waves arrive first?
P waves
What are also P-waves?
Sound waves
Which wave does most of the damage?
Surface waves
What are surface waves compose of?
P and S -waves
How do P - waves travel?
Parallel to the direction of propogation. (Compressed)
How do S - waves travel?
Perpendicular to the direction of propogation. (Traversed)
