Review from yesterday!
Review Match
• Seismologist • Seismograph • Seismogram
(1)
(2)
(3)
Let’s compare: NB and BC
seismographic activity
• Seismograph recordings in NB
Compare to…
• Seismograph recordings in SW BC
How do we read the _________________________?
What types of waves are measured by the
seismograph? Let’s see!
wave
Wave!
• Seismic wave (energy!)
• A wave produced when Earth’s
plates release energy (earthquake).
We can not see these waves, only the
effect on their surroundings.
3 main seismic waves
Body waves
P waves
S waves
L waves
Surface Wave
A.
Which waves are the smallest?
B. Which ones cause the most
damage?
C. Which waves travel the fastest?
Let’s find out!
(P) Primary wave (or longitudinal
wave)
•1st wave
•Fastest wave
•Can travel
through
solids/liquids/
gases.
(S) Secondary Wave (or transverse
wave)
• Next waves
after P waves
(slower)
• Move Up and
Down OR side
to side (like a
snake)
• Can move
through solids.
(L) Love Waves or Surface Waves
• Travel along surface of Earth
• Slowest waves
• Cause the most damage
•Let’s try making waves online! Can you make P, S and
L waves?
Can we use a slinky to create body
waves? Body waves are…..
P and S waves!
Use this chart to
write down your
information.
Use the slinky in
class or online to
draw a picture.
A.
Which waves are the smallest?
B. Which ones cause the most
damage?
C. Which waves travel the fastest?
Answer time!
A. P waves
B. L waves (slower, longer)
C. P waves
• Animation of an Earthquake. Notice how
fast the different waves travel AND the
seismogram readings at the different
seismograph locations!
• Can you locate an earthquake using
information from 1 seismograph? (hint –
look at the link above)