# Scin 138 Lab 4:Earthquakes and Seismology

**Topics:**Economics, Balance sheet, Supply and demand, Marketing, Variable cost, Costs /

**Pages:**6 (1340 words) /

**Published:**Jun 2nd, 2013

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

Answer Key: B

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

Answer Key: C

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

Answer Key: D

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

Answer Key: D

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

Answer Key: D

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