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Seismic Hazards Worksheet (Solved)

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Name Ibrahim Ahmed
Registration No. 2017-GE-30
WORK SHEET
Design Lab 7: Seismic Hazards
Your Mission: Use the computer program Seismic Eruption to investigate global seismic
hazards
Your Task:
1. Login to a computer in the computer lab and double click on the icon called Seismic
Eruption on your desktop. After the program opens, click on the Start button, then
click on the Go button.
2. Choose a region from the world map that interests you. You will be using this region
to familiarize yourself with the Seismic Eruption program. Click on the region. Next
click on a subset selection if available.
Name of the region/subset you chose Asia Group, Japan.
3. Now practice using the Seismic Eruption program. You will need to familiarize
yourself with special features in order to answer the questions on the following
pages. Check off the following boxes after you have practiced using the following
features:
Play/Pause/Rewind/F. Forward
Information
Step
EQ cutoff
Control→ Map View/3-D/Cross-Section
Control→ Interactive (3D)
Control → Set up Cross-Section View…
Practice Question #1: Briefly describe (3 sentences) the region that you are viewing (use
the Information button).
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The famous earthquakes and volcanoes of Japan are all related to subduction
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Japan’s three main islands contain about 70 volcanoes that have erupted in the last 10,000 years
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Sakura-jima volcano in Kyush has been erupting more or less continuously since 1960
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Practice Question #2: Start date of the data set you viewed 1960/01/02
Stop date of the data set you viewed 2020/06/22
Practice Question #3: Number of earthquakes that occurred during the above time range.
6630
Practice Question #4: Number of volcanoes that occurred during the above time range.
153
Now click the Back button a few times until you arrive at the original world map selection screen.
Use the following scenarios to answer the questions.
Scenario #1 Loma Prieta Earthquake
Hint: North America group, California group
Hint: View all 3 groups of data
Q1. What was the magnitude of the
Loma Prieta Earthquake? 7.1.
Q2. What time did the main shock hit? Just past 5:00 pm.
Q3. How many aftershocks were there? About 10,000.
Q4. How long did the aftershocks last? 1 year.
Q5. What was special about the main shock compared to the aftershocks?
The main shock had the highest magnitude (largest dot in the software).
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Scenario #2 Recent California Earthquakes
Hint: North America, California group, California
Q1. What is the time range of this data set?
1960/01/01 – 2020/06/22
Q2. How many earthquakes were there in total (M2-6)? 29762.
Q3. How many earthquakes greater than M5 were there? 770.
Q4. How many earthquakes greater than M7 were there? 6.
Q5. What were the magnitudes of these earthquakes? They ranged from 2-6.
Q6. What is the deepest depth of all the earthquakes in California? 50 km.
Scenario #3 United States Earthquakes
Hint: North America Group, United States
Q1. What is the time range of this data set?
1986/01/01 – 2020/06/22
Q2. Where did the deepest earthquakes occur? State Wyoming.
Q3. How many earthquakes occurred in Texas? More than 100.
Q4. How many earthquakes occurred in Alabama? 374.
Scenario #4 Hawaii Earthquakes
Hint: Pacific Group, Hawaii
Q1. Which of the Hawaiian Islands is this?
The Big Island of Hawaii
Q2. What is the time range of this data set? 2960/01/01 – 2009/10/01
Q3. How many volcanoes have been active on the island? 4.
Q4. How many eruptions? 2.
Q5. How many earthquakes greater than M6.5? 3.
Q6. Where did these occur? The Big Island of Hawaii.
Scenario #5 South America
Hint: South America
Q1. What is the time range of this data set?
1976/04/02 – 2020/06/22
Q2. Where in South America was the largest
earthquake ever recorded? Southern Chile.
Q3. What day did it occur? May 22, 1960.
Q4. What was its magnitude? 8.5
Q5. How many earthquakes in South America have been greater than M7.5? 27.
Q6. How many great than M8.0? 8.
Scenario #6 Sumatra
Hint: Asia, Sumatra 2004
Q1. What is the time range of this data set?
2004/12/25 – 2005/12/31
Q2. What was the magnitude of the main shock? 9.0
Q3. In what direction did most of the aftershocks take place? In the northeast.
Q4. How deep was the main shock located? 30 km.
Q5. When viewing a cross-section of the earthquake and aftershocks, do any patterns
stand out to you? If so, what?
From viewing the pattern, we can see that the earthquake and aftershocks observed a
line pattern, which indicates that there may be a plate boundary or an active fault in
this location.
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