16.5B| Reading a Travel-Time Diagram
- Due May 3, 2024 at 11:59pm
- Points 5
- Questions 5
- Available Jan 8, 2024 at 12am - May 6, 2024 at 11:59pm
- Time Limit None
- Allowed Attempts 3
Instructions
Overview
Another essential component of determining the epicenter of an earthquake is reading a travel-time graph.
The travel-time curves on the graph show the relationship between the distance traveled by seismic waves relative to the time it takes for them to travel that distance. We can use the fact that P-waves and S-waves produced by an earthquake travel at different velocities to determine the distance to the epicenter of an earthquake. As we learned in the previous exercise, there is a direct relationship between the difference in arrival time between the P and S waves (Car 1 and Car 2) and the distance traveled: the greater the difference (lag time) the greater the distance to the epicenter of an earthquake.
Instructions
Complete all the proceeding assignments, so you have the background information needed to interpret the illustrations and answer the questions. Study each illustration and consider what you have previously learned about earthquakes as you answer the questions. You have no time limit and three attempts.
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Time Needed
15-30 minutes.
Learning Objectives
Analyze seismogram records to locate earthquake epicenters and calculate the earthquake magnitudes.