Using Figure 2 graph, how far do S waves travel in 5 minutes? What about P waves? The travel-time graphFigure 2 is a seismic wave travel-timegraph. It shows the time required for Pand S waves to travel any distance up to3000 miles. The lag time for any15141312distance = travel time for S waves -11travel time for P waves. For example,consider a seismograph stationed 3,000miles from the epicenter of anearthquake. It takes S waves 14.7108minutes and P waves 8.3 minutes totravel 3,000 miles. Therefore, the lagtime for any point that is 3,000 milesfrom the epicenter will be 14.7 – 8.3minutes = 6.4 minutes.4Use Figure 2 to answer questions 6-9.326. How far do S waves travel in 5minutes? What about P waves?7. If your seismograph station islocated 1,000 miles from theepicenter of an earthquake, howlong will it take, to the nearest 0.1minutes, for the first P waves to travel from the epicenter to your station?501000 1500 200025003000Figure 2. Travel-time graph Distance in MilesWhat about the S waves?8. Based on your answers to the previous question, what is the lag time for locations that are1,000 miles from the epicenter of an earthquake?9. How does the lag time change as you get farther andfarther from the epicenter of an earthquake?MantealEoicenterS600 kmSdc PauloTime in Minutes400 km

Required : How far do S waves travel in 5 minutes? What about P waves.

Answered: Using Figure 2 graph, how far do S…

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Using Figure 2 graph, how far do S waves travel in 5 minutes? What about P waves?

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Concept explainers

Wave Motion

A wave motion is defined as the propagation of disturbances or transfer of energy and momentum from the state of rest or equilibrium to another point in a medium without any actual transfer of matter between them. In a simple explanation, it is the propagation of energy through a medium that is produced due to the repeated vibrations of the particles. Common things we see day to day like waves on water oscillation of a pendulum or bell, light wave, and all the subatomic particles exhibiting wavelike properties. The propagation of waves depends on the medium and their properties. The wave function is the disturbance that produces waves as a function of time. This disturbance oscillates periodically with a fixed frequency and wavelength. There are linear wave motion and non-linear wave motion based on their propagation, motion, and time period where linear wave motion is like sinusoidal waves and non-linear wave motion like a wave motion that gets interrupted in the middle of their propagation.

Question

Using Figure 2 graph, how far do S waves travel in 5 minutes? What about P waves?

The travel-time graph
Figure 2 is a seismic wave travel-time
graph. It shows the time required for P
and S waves to travel any distance up to
3000 miles. The lag time for any
15
14
13
12
distance = travel time for S waves -
11
travel time for P waves. For example,
consider a seismograph stationed 3,000
miles from the epicenter of an
earthquake. It takes S waves 14.7
10
8
minutes and P waves 8.3 minutes to
travel 3,000 miles. Therefore, the lag
time for any point that is 3,000 miles
from the epicenter will be 14.7 – 8.3
minutes = 6.4 minutes.
4
Use Figure 2 to answer questions 6-9.
3
2
6. How far do S waves travel in 5
minutes? What about P waves?
7. If your seismograph station is
located 1,000 miles from the
epicenter of an earthquake, how
long will it take, to the nearest 0.1
minutes, for the first P waves to travel from the epicenter to your station?
50
1000 1500 2000
2500
3000
Figure 2. Travel-time graph Distance in Miles
What about the S waves?
8. Based on your answers to the previous question, what is the lag time for locations that are
1,000 miles from the epicenter of an earthquake?
9. How does the lag time change as you get farther and
farther from the epicenter of an earthquake?
Manteal
Eoicenter
S600 km
Sdc Paulo
Time in Minutes
400 km

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