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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