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Earthquakes (Day 4) Reading Our Reference Table!

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Find Your New Seat! (1 Min) Review Procedures (ON PAPER) (3 Min) Answer Challenge Question: (1 Min) What do we know about the structure of the earth because of seismic waves? Do Now: 3 Tasks

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AIM How do we determine the distance of P and S waves, and/or the epicenter using our reference tables? Learning Target I CAN use my reference table and given information to calculate the distance of P and S waves as well as the epicenter of an earthquake. Agenda Catalyst Mini Lesson Practice (groups) Exit Ticket Aim, Learning Target & Agenda

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Using Page 11 of the ESRT we can determine how long it will take each type of wave (P and S) to travel a specific distance. Turn to Page 11

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The The X-axis measures DISTANCE from Epicenter

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The units on the X-axis are x10^3 km. Ex: 1 really is 1000 km.

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The scale on the X-axis goes by 200 km.

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The Y axis measures TIME IT TAKES WAVES TO TRAVEL

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The units on the Y axis are MINUTES

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The scale on the Y axis goes by 20 seconds.

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Example #1: If an earthquake occurred 4200 km away, how long did it take the P wave to get there?

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Example: If an earthquake occurred 4200 km away, how long did it take the P wave to get there?

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Example #2: If an earthquake occurred 4200 km away, how long did it take the S wave to get there?

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Example: If an earthquake occurred 4200 km away, how long did it take the S wave to get there?

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Example #3: If it took a P wave 5:20 to arrive at a location, how far is it from the epicenter?

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How long would it take the S wave to travel the SAME DISTANCE Example #3: If it took a P wave 5:20 to arrive at a location, how far is it from the epicenter? How long would it take the S wave to travel the SAME DISTANCE

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Example #3: If it took a P wave 5:20 to arrive at a location, how far is it from the epicenter? How long would it take the S wave to travel the SAME DISTANCE Example #3: If it took a P wave 5:20 to arrive at a location, how far is it from the epicenter? How long would it take the S wave to travel the SAME DISTANCE

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Distance from Epicenter P-Wave Travel Time S-Wave Travel Time 2,800 km 10 minutes Solve the table

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Example #4: If an earthquake occurred 2800 km away, how long did it take the P wave to get there?

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Example: If an earthquake occurred 2800 km away, how long did it take the P wave to get there?

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Distance from Epicenter P-Wave Travel Time S-Wave Travel Time 2,800 km5:20 10 minutes Solve the table

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Example: If an earthquake occurred 2800 km away, how long did it take the S WAVE to get there?

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Distance from Epicenter P-Wave Travel Time S-Wave Travel Time 2,800 km5:209:40 10 minutes Solve the table

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Example: If it took a P wave 10:00 to arrive at a location, how far is it from the epicenter?

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Distance from Epicenter P-Wave Travel Time S-Wave Travel Time 2,800 km5:209:40 6,600 KM10 minutes Solve the table

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Distance from Epicenter P-Wave Travel Time S-Wave Travel Time 2,800 km5:209:40 6,600 KM10 minutes18:10 Solve the table

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