Exam 2 - Tsunami

Question 1

Japan has put these up surrounding the beaches in order to limit the damage from tsunamis and waves caused by storms

Answer 1

Sea Wall

Question 2

The Miyako megathrust earthquake resulted in a _______ that made it all the way to _____

Answer 2

California

Question 3

Did anyone die in California from the Miyako megathrust earthquake?

Answer 3

Yes, one man because he was taking pictures on the beach even though they weren’t supposed to be on the coast

Question 4

What was the largest earthquake?

Answer 4

1960 Chile Tsunami

Question 5

Where was the pacific tsunami waring system created?

Answer 5

In Hawaii

Question 6

Why was the pacific tsunami warning system created?

Answer 6

in order to alert other countries around the pacific to let them know a tsunami was coming

Question 7

How do the buoy sensors work?

Answer 7

They are connected to the sea bottom. The sensor feels the tsunami, relay it to buoys, relay it to a satellite, which is then relayed to the institution on where and how big the tsunami is

Question 8

Waves are

Answer 8

energy in motion

Question 9

Waves move through

Answer 9

a medium

Question 10

Crest

Answer 10

top of the wave

Question 11

Trough

Answer 11

bottom of the wave

Question 12

Wavelength (L)

Answer 12

length from crest to crest

Question 13

Wave Height (H)

Answer 13

vertical difference between trough and crest

Question 14

Wave Period (T)

Answer 14

time that elapses between successive crests

Question 15

Characteristic of tsunami wave

Answer 15

Very large, long-wavelength, very destructive series of waves

Question 16

Are tsunamis one singular wave?

Answer 16

No

Question 17

Tsunamis are formed

Answer 17

at the depths of the ocean

Question 18

Tsunamis are usually at

Answer 18

subduction zones

Question 19

Tsunamis generate

Answer 19

at a fault that is between a continental fault and a crust fault

Question 20

Areas at risk for tsunamis

Answer 20

flat coasts

Question 21

The ______ is more detrimental than the _____ of the waves in a tsunami

Answer 21

momentum; height

Question 22

In comparing tsunami waves to regular waves

Answer 22

there is a rotating motion presenting hardly any hazard in regular waves

Question 23

During tsunamis, at the shore there are

Answer 23

• Increased wave height
• Decreased wavelength
• Decrease in Velocity

Question 24

If the crest of the tsunami arrives first

Answer 24

lot of water on land very fast

Question 25

If trough arrives first

Answer 25

the water sucks out to sea killing closer fish, sucking water away with a low tide

Question 26

Large Marine

Answer 26

causes of tsunamis

Question 27

Cause 90% of tsunamis

Answer 27

Earthquakes

Question 28

Landslides

Answer 28

cause of tsunamis

Question 29

Volcanic Eruptions

Answer 29

cause of tsunamis

Question 30

Largest occurrence of tsunamis

Answer 30

the Pacific Ocean

Question 31

A subduction zone is locked by

Answer 31

friction

Question 32

The land at the coast sometimes _____ because the _______ crust drops; making the waves go over easier

Answer 32

lowers; continental

Question 33

Cascadia subduction zone is a

Answer 33

subduction convergent boundary

Question 34

The Cascadia subduction zone has the potential of a

Answer 34

M=9 megathrust earthquake