Quakes

1. A seismographic station records a travel time difference of 3 minutes between P-waves and S-waves of an earthquake. Approximately how far is the seismic station from the epicenter of the earth-quake?

1000 km
1500 km
3200 km
4800 km

2. P waves arrive at a seismic station at 12:09:00 PM. S waves from the same earthquake arrive at 12:18:20. How far from the siesmic station from the epicenter?

9,200 km
3,600 km
8,000 km
4,800 km

3. The time that an earthquake occurred can be inferred by knowing the

Arrival time of the P-waves.
Arrival time of the S-waves.
Distance between seismic stations.
Epicenter distance and arrival time of the P-waves.

4. A seismic station is 2000 km from the epicenter of an earthquake. If P waves arrive at 4:15:00 PM, at what time will S waves from the same earthquate arrive?

4:11:40 PM
4:18:20PM
4:22:20 PM
7:20:00 PM

5. If it takes P waves 7 minutes to travel from an epicenter to a seismic station, how long will it take S waves from the same earthquake to arrive at the satation?

19 minutes
9 minutes 20 seconds
1 minute 40 seconds
12 minutes 40 seconds

6. An earthquake occurs at 1:15:00 AM. S waves from that earthquake arrived at a seismic station at 1:25:00 AM. At what time did P waves arrive?

1:30:40 AM
3:00:00 AM
5:40:00 AM
1:26:20 AM

7. At equal depths in the Earth, S-waves travel

Always faster than P-waves.
Always slower than P-waves.
Always at the same rate as P-waves.
Sometimes slower and sometimes faster than P-waves.

8. According to the Earth Science Reference Tables, if a seismograph station records a difference in arrival times between P-waves and S-waves of 4 minutes, how far away is the epicenter of the Earthquake?

1000 Km.
1900 Km.
2600 Km.
5200 Km.

9. A seismic station is 4000 km from an epicenter. P waves arrive at 2:23:00 PM. What is the time of origin of the earthquake?

2:10:20 PM
7:00:00 PM
2:16:00 PM
2:18:40 PM

10. The time lapse between the arrival of P-waves and S-waves at one seismograph recording station can be used to determine the

Magnitude of the earthquake
Exact location of the epicenter
Exact depth of the earthquake
Distance to the epicenter

11. As the distance between an observer and an earthquake decreases, the difference in arrival times of P and S waves

Decreases
Increases
Remains the same

12. Based on the Reference Tables, about how far away from the receiving station is the epicenter of an earthquake if the difference in arrival times of P-waves and S-waves is six minutes and thirty seconds?

3000 Km.
5000 Km.
6300 Km.
8000 Km.

13. An earthquake occurred at 5:00:00 A.M. At what time would the P-wave reach a seismic station 3000 kilometers from the epicenter?

5:04:30 A.M.
5:05:40 A.M.
5:10:12 A.M.
6:15:00 A.M.

14. The epicenter of an earthquake is located near Massena, New York. According to the Earth Science Reference Tables, the greatest difference in arrival times of P-waves and S-waves for this earthquake would be recorded in

Albany, N.Y.
Utica, N.Y.
Plattsburgh, N.Y.
Binghamton, N.Y.

15. The difference in arrival times of P waves and S waves is 6 minutes and 40 seconds. How far is the seismic station from the epicenter?

5200 km
800 km
4800 km
1800 km

16. It takes P waves 4 minutes to travel from the epicenter of an earthquake to a seismic station. How long will it take S waves from the same earthquake to reach that seismic station?

2 minutes
4 minutes
7 minutes and 20 seconds
12 minutes and 30 seconds

17. According to the Earth Science Reference Tables, approximately how far will a P-wave travel in eight minutes?

2,200 Km
4,800 Km
6,500 Km
11,200 Km

18. Following an earthquake, a seismograph station recorded the arrival of a P-waveat 3:09:30 a.m. and an S-wave at 3:14:00a.m. According to the Earth Science Reference tables, what is the distance from the seismic station to the epicenter of the earthquake

1,200 km
3,000 km
6,100 km
7,500 km

19. A seismograph station determines that its distance from the epicenter of an earthquake is 4000 kilometers. According to the Reference Tables, if the P-wave arrived at the station at 10:15 a.m., the time of the earthquakes's origin was

10:02 a.m.
10:08 a.m.
10:10 a.m.
10:22 a.m.

20. How far will S waves travel in 17 minutes?

6000 km
5000 km
4200 km
2800 km

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