Exercise * Earthquakes & Earth's Interior Answer Key

1. 11

2. Five

3. Seven

4. 5

5. 30

6. greater

7. increases

8. 1000 miles - 3.25 minutes difference; 2400 km - 4.20 minutes difference; 3000 miles - 6.50 minutes difference

9. 2100 miles

10. 7 (approximate)

11. 10:32 PM (approximate)

12. Table 8.1 If you get relatively close, that's good.

New York_* Seattle___* Mexico City

Elapsed time between first P and first S wave * 5.5 minutes * 4 minutes * 3.5 minutes

Distance from epicenter in miles __________ * 2400 miles * 1400 miles * 1200 miles

13. & 14. on Figure 8.5

15. 28 degree N latitude and 112 degree 30 minutes west longitude

16. 8:54 UTC (7 minutes difference between the actual time of the earthquake and when it was recorded in New York