Seismic Wave Travel Time Calculations

The video tutorial covers graphing earthquake data, focusing on understanding travel times and epicenter distances. It explains how to interpret graph axes and units, solve math problems related to earthquakes, and provides examples of calculating travel times and distances using given data. The lesson emphasizes using provided information to solve problems and checking the reasonableness of answers.

What is the primary focus of today's lesson?

• Exploring different types of seismic waves

• Studying the effects of earthquakes on buildings

• Understanding the relationship between travel times and epicenter distance

• Learning about the history of earthquakes

On the graph, what does each box on the y-axis represent?

• 10 seconds

• 20 seconds

• 40 seconds

• 30 seconds

How far is each box on the x-axis in terms of epicenter distance?

• 250 kilometers

• 100 kilometers

• 150 kilometers

• 200 kilometers

What should you always do when solving problems related to earthquakes?

• Ignore the given data

• Make assumptions based on previous knowledge

• Guess the answer if unsure

• Use the information provided in the question

If an earthquake's epicenter is 4000 kilometers away, what is the travel time of the P-wave?

• 5 minutes

• 6 minutes

• 8 minutes

• 7 minutes

How far is a seismic station if a P-wave travels for 9 minutes?

• 5000 kilometers

• 5200 kilometers

• 5600 kilometers

• 5400 kilometers

What is the first step in solving the challenging example problem?

• Estimate the origin time

• Calculate the epicenter distance

• Identify the type of wave

• Determine the travel time

In the challenging example, what is the travel time if the origin time is 10:02 p.m. and the arrival time is 10:10 p.m.?

• 7 minutes

• 6 minutes

• 8 minutes

• 9 minutes

What is the epicenter distance if the travel time is 8 minutes for an S-wave?

• 2200 kilometers

• 2400 kilometers

• 2000 kilometers

• 1800 kilometers

What can you calculate if you know the epicenter distance?

• The travel time

• The arrival time

• The type of wave

• The origin time