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6/23/22, 9:44 PM
Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
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Part I – Watch the 54 minute NOVA film on “Japan’s Killer Quake” on the devastating
2011 earthquake and tsunami and answer the associated questions.
Question 1
0.5 pts
This the largest earthquake in Japan in ______ years
100
20
1000
300
500
Question 2
0.5 pts
What is the name of the seismic wave that reaches land first?
seismic waves
the ocean wave
the secondary tidal wave
the primary tsunami wave
the p-wave
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Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
Question 3
0.5 pts
How fast was it moving across the open ocean?
4 miles per second
80 meters per second
20 meters per second
80 miles per hour
4 miles per hour
Question 4
0.5 pts
How long does it take for that first seismic wave to reach land?
15 seconds
10 minutes
a few minutes
3 minutes
a few seconds
Question 5
0.5 pts
Which seismic wave shakes from side-to-side making the ground shake?
co-seismic waves
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Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
tsunami waves
p-waves
the s-waves
longitudinal waves
Question 6
0.5 pts
What type of power plant is affected?
drinking water plant
wastewater treatment plant
coal-fired power plant
nuclear plant
natural gas plant
Question 7
0.5 pts
Before this earthquake, the largest ever recorded earthquake was a magnitude
___________.
Magnitude 8.9
Magnitude 8.4
Magnitude 6.6
Magnitude 9.2
Magnitude 7.6
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Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
Question 8
0.5 pts
How fast are the tectonic plates moving?
3 feet per day
2 feet per year
3 inches per year
2 inches per day
½ inch per year
Question 9
0.5 pts
It is said that they move as fast as your ________________ grow.
fingernails
bones
hair
eyelashes
ears
Question 10
1 pts
What type of plate tectonic movement caused this tsunami? Be specific.
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Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
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Question 11
0.5 pts
How many seconds warning did the city of Tokyo have before the ground started
shaking?
10 seconds
3 seconds
16 seconds
60 seconds
30 seconds
Question 12
0.5 pts
How long does the earth shaking last in Tokyo?
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Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
1 minutes
4 minutes
2 minutes
3 minutes
5 minutes
Question 13
1 pts
What did liquefaction look like in the city park?
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Question 14
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0.5 pts
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Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
What was the magnitude of this earthquake?
Magnitude 7.6
Magnitude 8.9
Magnitude 8.4
Magnitude 6.6
Magnitude 9
Question 15
1 pts
How is the tsunami wave made? Use specific plates names.
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Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
Question 16
1 pts
How does the tsunami wave speed vary with water depth? And what effect does this
have on wave height?
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Question 17
0.5 pts
How long is it before the tsunami wave reaches shore?
an hour
30 miles wide
just minutes
just seconds
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Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
500 miles per hour
Question 18
1 pts
Why did the intensity of the tsunami vary from town to town along the Japanese
coast?
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Question 19
0.5 pts
Why did the tsunami breach the 30 foot high seawalls at some cities?
because the earthquake was much larger than expected
because the seawalls were damaged by the earthquake
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Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
because the land subsided
because the tsunami wave was much higher than anticipated
Question 20
0.5 pts
What does it mean when we say the “land has subsided”?
It means the seawalls were too low.
It means the beach sands were removed by previous tsunamis so they weren’t there to
protect against this one.
It means the land wasn’t strong enough.
It means the land elevation lowered.
Question 21
0.5 pts
How much did the entire shoreline drop in elevation (or the height of the land)?
3 feet high
1 foot
3 meters high
10 feet high
Question 22
0.5 pts
How high was the tsunami wave at Hawaii?
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Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
1 foot
10 feet high
3 feet high
3 meters high
Question 23
1 pts
Why is the tsunami wave smaller on the far side of the Pacific away from
earthquake?
Question 24
1 pts
How were the tectonic stresses transferred to other parts of the crust during the
earthquake?
Is the earthquake and tsunami risk greater or lesser near Tokyo now?
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Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
Question 25
1 pts
Where is there a similar tsunami hazard in North America and what earthquake size
is expected there?
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Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
Part II – Read the New Yorker article on the earthquake and tsunami hazard in the
Pacific Northwest region of the United States.
Take notes as you read and answer the question(s) below.
Question 26
5 pts
Summarize the article and how it describes the earthquake hazard. Include a
description of the specific geological processes that cause the earthquake, the
evidence that geologist used to uncover this story, and earthquake preparedness of
the area.
You will have to address the “ghost forest”, how they figured out the date of the last
earthquake, and the recurrence interval.
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Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
Part III – Watch the 10-minute video on the Wasatch Fault by the Utah Geological
Survey and answer the questions.
Wasatch Fault Fly By Video (high quality)
Question 27
0.5 pts
What is the name of the seismically active area in Utah, Wyoming, Idaho, and
Montana?
San Andreas Fault Zone
Yellowstone National Park
Wasatch Fault Zone
Basin and Range Province
Intermountain Seismic Belt
Question 28
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0.5 pts
16/22
6/23/22, 9:44 PM
Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
Normal faults are formed by ___.
crustal stretching
crustal compression
crustal shear
crustal depression
subduction
Question 29
0.5 pts
How many large earthquakes (M 6 to 7) have occurred on the Wasatch fault over the
past 10,000 years?
several but there is no record of them.
three
one
none
numerous earthquakes with surface ruptures
Question 30
0.5 pts
What percentage of Utah’s population live along the Wasatch Fault?
80%
60%
10%
40%
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Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
20%
Question 31
0.5 pts
What best describes the earthquake risk along the Wasatch Fault?
Low risk because the earthquakes are very rare.
Greatest earthquake risk in the interior United States.
Although there have been prehistoric large earthquakes, there won’t be any in the future.
Low risk because the earthquakes can’t be very big this far inland from a plate boundary.
Question 32
0.5 pts
What is the expected maximum earthquake magnitude?
6.0
7.5
9.1
5.5
6.7
Question 33
0.5 pts
What is the composite recurrence interval for the Wasatch Fault?
1000 years
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6/23/22, 9:44 PM
Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
Once every 300 to 400 years
14,500 years
1,200 years
20 to 50 years
Question 34
0.5 pts
How much land is offset vertically at the fault scarp during a large earthquake that
ruptures the surface?
24 to 36 inches
100 to 130 feet
6 inches
6 to 10 feet
2 to 3 feet
Question 35
0.5 pts
What are the fault scarps like at Bells Canyon?
Scarps are 100 to 130 feet high form by 7 to 10 large earthquakes in the past 18,000 years.
There a two of them that show that at least two large earthquakes occurred since the last Ice
Age
Scarps are covered in vegetation, so there is no longer an earthquake risk at that location.
They cut into an ancient delta deposit of Lake Bonneville
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6/23/22, 9:44 PM
Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
Question 36
0.5 pts
What important key structures cross the fault?
Roads, bridges, and utility corridors carrying water, sewage, electricity, natural gas, and
petroleum
Park City Ski Resort and the McMillen Art Gallery in Park City
University of Utah football stadium
State Capitol Building and the Temple Building
City Creek Mall and Gateway Mall Cinema
Earthquake Recurrence
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6/23/22, 9:44 PM
Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
This image is of earthquake recurrence on different segments of the Wasatch Fault.
Use this image to answer the following questions. Assume a regular recurrence of
earthquakes, where earthquakes happen at evenly spaced intervals of time. For an
in-depth discussion on the subject, see the working group paper
(http://ugspub.nr.utah.gov/publications/misc_pubs/mp-16-3/mp-16-3.pdf) .
Question 37
1 pts
Which segment had the most recent major earthquake?
Nephi
Provo
Weber
Brigham City
Salt Lake City
Question 38
1 pts
On any individual fault segment, how often do large earthquakes occur?
about 50 years
about 100 years
about 1000 years
about 3000 years
Question 39
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1 pts
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6/23/22, 9:44 PM
Quiz: Lab 9: Earthquakes and Tsunamis in Japan, the Pacific Northwest, and the Wasatch Range
Which segment has the greatest probability of a large earthquake (which segment
has the largest seismic gap)?
Salt Lake City
Nephi
Weber
Provo
Brigham City
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