# Scin 138 Lab 4:Earthquakes and Seismology

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Scin 138 Lab 4:Earthquakes and Seismology
Part 1 of 1 - 40.85/ 100.00001 Points

Question 1 of 22 4.55/ 4.55 Points
Record your answer from Lab Exercise #1, Step 1, Question 1.What time in hours:minutes:seconds GMT did the P waves arrive? A. 01:48:00
Correct
B. 01:49:00 C. 01:50:00 D. 01:51:00

Question 2 of 22 0.0/ 4.55 Points
Record your answer from Lab Exercise #1, Step 1, Question 2. What time in hours:minutes:seconds GMT did the S waves arrive? A. 01:51:30 B. 01:52:00 C. 01:53:10
Incorrect
D. 01:54:20

Feedback: (C) is the correct answer. 01:53:10.
Question 3 of 22 0.0/ 4.55 Points
Record your answer from Lab Exercise #1, Step 1, Question 3. What is the time lag (S-P) in hours:minutes:seconds? A. 00:02:00 B. 00:03:20
Incorrect
C. 00:03:30 D. 00:04:10

Feedback: (D) is the correct answer. The lag time is 4m 10s.
Question 4 of 22 0.0/ 4.55 Points
Record your answer from Lab Exercise #1, Step 1, Question 4. What is the distance in kilometers between the seismic station and the epicenter? A. 2400 km
Incorrect
B. 2600 km C. 2800 km D. 3000 km

Feedback: (D) is the correct answer. The station is 3000 km from the epicenter of the earthquake.
Question 5 of 22 0.0/ 4.55 Points
Questions 5 through 11 are based on Lab Exercise #2: Locating the Epicenter of an Earthquake. Use the seismogram attached to the Week 3 Announcement, do NOT use Figure 4.11 on page 91.

Record your answer from Lab Exercise #2, Step 1. What is the time lag for the Seattle, Washington, seismic station? A. 45 seconds B. 50 seconds
Incorrect
C. 55 seconds D. 60 seconds

Feedback: (D) is the correct answer. The time lag for Seattle is 60 seconds.
Question 6 of 22 0.0/ 4.55 Points
Record your answer from Lab Exercise #2, Step 2. What is the distance between the Seattle seismic

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