Day 4 - Plate Motion Engineering Internship

Day 4 - Plate Motion Engineering Internship

Poll

Would you rather...

• Live on the beach

• Live in the mountains

Multiple Choice

Mountains and ocean trenches are found at ________ boundaries.

• convergent

• divergent

Multiple Choice

Mid-ocean ridges are found at ________ boundaries.

• convergent

• divergent

Multiple Choice

Which areas are more likely to have earthquakes that can cause tsunamis? Why?

• convergent boundaries

• divergent boundaries

As we read: Answer and discuss slide 4

1) How do tsunamis work?

2) What boundary type should we put sensors near?

Multiple Choice

Why are tsunamis more likely to happen at convergent plate boundaries?

• Because the plates are moving apart, there is no where else for the water to go but up.

• The sideways movement of the plates causes the water to displace upward.

• When the plates move together and one subducts, it causes an upward displacement of water.

Multiple Choice

True or False: You will find a lot of tsunamis near divergent plate boundaries.

• True

• False

Multiple Choice

What is the purpose of your engineering project?

• To help warn us of when a tsunami hits California.
• To design a tsunami warning system to help the citizens of Sri Lanka.
• To build a shelter for people to go to after a tsunami hits.
• To let us know when earthquakes are going to hit the west coast.

Multiple Choice

How could you interpret the data in the summary flag for this sensor?

• This sensor isn’t working, (not helping detect any earthquakes or tsunamis)

• There aren't any earthquakes or tsunamis at that sensor

Multiple Choice

Did this sensor detect tsunamis?

• YES, it detected five tsunamis (1 was a false alarm)

• NO, because it broke

Multiple Choice

Which of the following is NOT one of the criteria for your TsunamiAlert design?

• Maximize average warning time.

• Minimize false alarms.

• Creating a safe location for people.

• Minimize costs.

Poll

How could you change the sensor placement to avoid a false alarm like this one?

• Move the shallow sensor farther away beyond where the local tsunami wave reaches

• Remove one or more of the sensors

• Something else (write in google chat)

Poll

How could you interpret the data for this earthquake?

• This is an ocean-wide tsunami. The earthquake that caused it was strong—8.2—and on a convergent plate boundary.

• The earthquake sensor doesn’t have a flag, so it didn’t detect anything. It’s probably too far from the earthquake.

• Sri Lanka did not receive any warning for this tsunami that reached its shores. 0 minutes warning won’t help people get to safety.

• The shallow sensor broke because it was too close to the earthquake. It might have helped give a warning if it didn’t break.