2, 8, 3, 5, 6, 7, Epicenter Distance (* 10?Km), Example 1: How Long Does It Take A P-Wave To Travel

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8
3
5
6
7
EPICENTER DISTANCE (* 10° km)
Example 1: How long does it take a P-wave to travel 4,000 km? Answer: 7 minutes
Guide questions:
Q1. Explain how did we get the time arrival of P-wave in the given sample?
QZ. How long does it take an S-wave to travel 4,000 km?
Q3. How long does it take a P-wave to travel 8,000 km2
Q4. How far can an S-wave travel in 9 minutes?
Q5. How far a P-wave travel in 9 minutes ?

 

Answer:

1.P and S waves travel at different speeds, and it’s the difference in arrival times of the waves that is used to to determine the distance to the event. P waves travel the fastest, thus they arrive at your recording station first. Note the characteristics between the different wave styles of the P vs S waves, then look at what are called “surface waves”, officially called “Love” and “Rayleigh” waves. It’s the high energy surface waves that do the most damage in a quake:

2. The graph shows that the S-waves need about 12 minutes: 40 seconds to travel the same distance. Therefore, if the time separation between the arrival time of the P- and S-waves is 5 minutes:40 seconds, the epicenter must be 4000 km away.

3. Approximately 11 minutes and 20 seconds.

4. 5,600 km

5. 16900 per hour

Explanation:

Hope its helps