Geology Reference
In-Depth Information
18. If Earth were completely solid and homogeneous
throughout, how would P- and S-waves behave as
they traveled through the planet? How do they actually
behave?
19. Why do scientists think that the inner core is solid
and the outer core is liquid? What is the core
composed of?
20. From the arrival times of P- and S-waves shown in
the accompanying chart and the graph in Figure 8.9b,
calculate how far away from each seismograph station
the earthquake occurred. How would you determine
the epicenter of this earthquake?
Arrival Time of P-Wave Arrival Time of S-Wave
Station A: 2:59:03
P
.
M
.
3:04:03
P
.
M
.
Station B: 2:51:16
P
.
M
.
3:01:16
P
.
M
.
Station C: 2:48:25
P
.
M
.
2:55:55
P
.
M
.
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