seismic waves Flashcards
(20 cards)
when are seismic waves created?
in an earthquake
what are the types of seismic waves?
body and surface waves
what are the two types of body waves?
p and s
what are body waves?
travel through the interior of the earth
which body wave moves the fastest?
p waves
what can o waves travel though?
solid liquid and gas
what can s waves travel through?
only through solid
what kind of waves are s waves?
tranverse
move up and down
what kind of waves are p waves?
compressional
back and forth
which body waves cause the most damage?
s waves
what are the two types of surface waves?
l and r
which surface wave is faster?
l wave
what movement does an l wave have>
horizontal
what kind of motion does an r wave have>
elliptical
what is meant by refkected and refracted?
rebounded]
change of angle
if an area is more dense how is it refracted?
if an area is more dense then the angle turns inwards
what doe the p waves show about the earths structure?
can be detected widely
except for a shadow w at 103 142 degrees after travelling through the outer core
conclusion that the inner core is solid as the angle then is refracted inwards
where is there a shadow of p waves?
103 and 142
what do s waves show about the earths structure?
only detected up to a quarter to 103 degrees then non are detected
showing that the outer core must be liquid
where can s waves only be detected up to?
quarter to 103 degrees
