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ACTIVITY 3  A Reading Seismograms Geologists can gather a lot of data from seismogram recordings. In this activity, you will analyze seismograms to glean more data about an earthquake’s location and magnitude. 1. Label the P-waves, S-waves, and surface waves on the seismogram above. 2. How much time elapsed between the first Pand S-waves? Subtract the time of the first P-wave from the time of the first S-wave. 3. Print out the nomogram (Figure 16).

ACTIVITY 3  A Reading Seismograms Geologists can gather a lot of data from seismogram recordings. In this activity, you will analyze seismograms to glean more data about an earthquake’s location and magnitude. 1. Label the P-waves, S-waves, and surface waves on the seismogram above. 2. How much time elapsed between the first Pand S-waves? Subtract the time of the first P-wave from the time of the first S-wave. 3. Print out the nomogram (Figure 16).

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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ACTIVITY 3
 A Reading Seismograms


Geologists can gather a lot of data from seismogram recordings. In this activity, you will analyze
seismograms to glean more data about an
earthquake’s location and magnitude.


1. Label the P-waves, S-waves, and surface
waves on the seismogram above.

2. How much time elapsed between the first Pand S-waves? Subtract the time of the first
P-wave from the time of the first S-wave.


3. Print out the nomogram (Figure 16).


4. Mark the S-P time (calculated in Step 2) on
the nomogram. What is the corresponding
distance from the epicenter?


5. The earthquake had an amplitude of 7
millimeters. Mark the amplitude on the right
side of the nomogram.

Figure 15. 1 wah www 2 3 5 Time (minutes) 4 6 7
Transcribed Image Text:Figure 15. 1 wah www 2 3 5 Time (minutes) 4 6 7
ACTIVITY 3 continued Figure 16. 500- 400 300 200 100 60 40 20 5 Distance from Epicenter (km) 0 I T I 50 40 30 10 4 -2 S-P Time (s) P S 0 10 20 6 5 4 3 2 T Magnitude L 10 20 30 Amplitude 23 mm I I I 100 50 20 10 5 2 1 0.5 - 0.2 0.1 Amplitude (mm)
Transcribed Image Text:ACTIVITY 3 continued Figure 16. 500- 400 300 200 100 60 40 20 5 Distance from Epicenter (km) 0 I T I 50 40 30 10 4 -2 S-P Time (s) P S 0 10 20 6 5 4 3 2 T Magnitude L 10 20 30 Amplitude 23 mm I I I 100 50 20 10 5 2 1 0.5 - 0.2 0.1 Amplitude (mm)
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