Earthquakes (Day 4)

Reading Our Reference Table!

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

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

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

The The X-axis measures DISTANCE from Epicenter

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

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

The Y axis measures TIME IT TAKES WAVES TO TRAVEL

The units on the Y axis are MINUTES

The scale on the Y axis goes by 20 seconds.

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

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

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

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

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

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

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

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

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

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

Distance from Epicenter

P-Wave Travel Time

S-Wave Travel Time

2,800 km

10 minutes

Solve the table

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

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

Distance from Epicenter

P-Wave Travel Time

S-Wave Travel Time

2,800 km 5:20

10 minutes

Solve the table

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

Distance from Epicenter

P-Wave Travel Time

S-Wave Travel Time

2,800 km 5:20 9:40

10 minutes

Solve the table

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

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

Distance from Epicenter

P-Wave Travel Time

S-Wave Travel Time

2,800 km 5:20 9:40

6,600 KM 10 minutes

Solve the table

Distance from Epicenter

P-Wave Travel Time

S-Wave Travel Time

2,800 km 5:20 9:40

6,600 KM 10 minutes 18:10

Solve the table