Lesson 5

Question 1

How do tsunamis work?

Answer 1

When the heavier oceanic plate tries to go under the continental plate it eventually will flip which causes waves

Question 2

What determines the impact of tsunamis? (5)

Answer 2

duration of the event
wave amplitude, water column displacement distance travelled
Physical geography of coast (if theres coastal development)
timing of the event quality of warning signs
Coastal ecosystems for protection (mangroves)

Question 3

What is the case study for tsunamis?

Answer 3

Tohoku Japan 2011

Question 4

What was the cause of Tohoku?

Answer 4

The earthquake triggered the tsunami
The Japan trench is a result from the Pacific Oceanic plate pressing down under the continental plates barring Japan Islands

Question 5

In the Tohoku earthquake how far did the plates slide past each other?

Answer 5

80 meters

Question 6

What are the characteristics of Tohoku? (4)

Answer 6

Hight 39 meters
2 meter waves (highest wave ever recorded)
Magnitude 9
Lifted sea floor by 10 meters

Question 7

What where the impacts of Tohoku? (6)

Answer 7

16,000 deaths
2,500 missing 
6,000 injuries
$220 billion in damage in Japan
4th largest earthquake in world
Resulted in nuclear disaster in Fukushima