Font size
WorksheetsEarthquake Engineering
Total questions: 92
Worksheet time: 58mins
It is the science of the performance of buildings and structures when subjected to seismic loading.
Design of building
Earthquake engineering
Structural Engineering
Which of the following is NOT an aim of earthquake engineering?
Proper design of structures to resist earthquakes
Construction according to building codes
Making structures completely earthquake-proof
Analyzing the effects of seismic loading
What does seismology primarily study?
The movement of tectonic plates without considering waves
The scientific study of earthquakes and the propagation of seismic waves through the Earth
The design of earthquake-resistant structures
The weather patterns before and after an earthquake
The term seismology comes from the Greek words “seismos” and “logia.” What do these words mean?
“Seismos” = fire, “logia” = ground
“Seismos” = earthquake, “logia” = study
“Seismos” = vibration, “logia” = destruction
“Seismos” = wave, “logia” = analysis
Aside from earthquakes, seismology also examines seismic waves caused by:
Solar radiation and moon cycles
Volcanic activity and geological processes
Heavy rainfall and flooding
Earthquake effects on the lives of the people
The word “seismology” comes from the Latin words “seismos” (wave) and “logia” (analysis).
True
False
The word “seismology” comes from the Latin words “seismos” (wave) and “logia” (analysis).Seismology only deals with earthquakes and does not include volcanic activity.
True
False
The Continental Drift Theory suggests that continents have always been fixed in their current positions.
True
False
What do seismologists analyze to understand Earth’s internal structure and tectonic plate dynamics?
Weather patterns
Ocean currents
Seismic waves
Magnetic fields
Which instrument records seismic waves caused by earthquakes, explosions, or other Earth-shaking events?
(a)
The terms seismograph and seismometer are often used interchangeably. What is the key difference?
A seismometer is more accurate than a seismograph
A seismometer can record seismic waves, while a seismograph only detects and measures them
A seismometer only measures man-made explosions
A seismograph can record seismic waves, while a seismometer only detects and measures them
A record produced by a seismograph on a display screen orpaperprintout is called
(a)
Who originally proposed the Continental Drift Theory in the early 1900s?
(a)
The most recent supercontinent, which began breaking apart around 200 million years ago, is called:
(a)
A geology student notices that the east coast of South America seems to align closely with the west coast of Africa. This observation best supports which theory?
Plate Tectonics Theory
Big Bang Theory
Seafloor Spreading Theory
Continental Drift Theory
Which of the following is NOT evidence that Wegener used to support the Continental Drift Theory?
The current speed of tectonic plate movements measured by GPS
Similar fossil records found across different continents
Matching geological formations and glacial marks across continents
The apparent fit of continental coastlines like South America and Africa
Which of the following was the vast ocean that surrounded the supercontinent Pangaea?
Panthalassa
Mediterranean Sea
Tethys Sea
Atlantic Ocean
One major drawback of Wegener’s Continental Drift Theory was his failure to explain:
Why Pangaea existed
Why the drift began only during the Mesozoic era
Why volcanoes form in island arcs
Why fossils appear in rock layers
Which of the following was a weakness in Wegener’s proposed driving forces for continental drift?
Plate boundary movement
Mantle convection currents
Buoyancy, tidal currents, and gravity (too weak to move continents)
Subduction zones
A professor explains that Wegener’s theory was incomplete because it did not account for the role of the seafloor in continental movement. Which specific drawback is being referred to?
The theory doesn’t consider oceans
The theory ignored mountain formation
The theory lacked fossil evidence
The theory dismissed volcanic activity
Which modern theory eventually validated and improved upon Wegener’s Continental Drift Theory?
Big Bang Theory
Plate Tectonics Theory
Elastic Rebound Theory
Seafloor Sedimentation Theory
Which of the following highlights the significance of the Continental Drift Theory?
Transformed the field of geology by explaining phenomena such as earthquakes
It eliminated the need for fossil evidence in geology
It proved that continents are fixed and immovable
It completely rejected the existence of Pangaea
One criticism of the Continental Drift Theory was that it relied on assumptions that were too general.
True
False
Wegener’s Continental Drift Theory was immediately accepted by the scientific community without criticism.
True
False
Larger earthquakes always cause damage only near the epicenter.
True
False
Modern evidence from satellite data, magnetic anomalies, and seafloor spreading has validated Wegener’s groundbreaking hypothesis
True
False
Most of the Earth’s major geological activity occurs at the plate boundaries, the zone where plates meet and interact.
True
False
Some soils act as seismic wave filters, attenuating shaking at some frequencies while amplifying it at others
True
False
In which decade was the Theory of Plate Tectonics presented?
1960s
1970s
1950s
1940s
What is the primary cause of tectonic plate movement?
Ocean currents in the Pacific Ocean
Gravitational pull of the Moon
Convection in the lithosphere and asthenosphere
Earth’s rotation around the Sun
At what approximate rate do tectonic plates move each year?
10–20 inches
Less than one inch
1–6 inches
12–24 inches
A geologist observes two tectonic plates sticking together and then suddenly ripping apart, releasing energy. This interaction happens at specific locations where plates meet. What are these locations called?
Fault lines
Plateaus
Plate boundaries
Hotspots
The places where tectonic plates collide, stick, or separate are called
(a)
The slow movement of tectonic plates is caused by (a) currents in the lithosphere and asthenosphere.
The semi-fluid layer beneath the lithosphere, where convection currents occur, is the
(a)
What is the name of the theory that explains the movement of Earth’s plates?
Seismology Theory
Plate Tectonics Theory
Continental Drift Theory
Elastic Rebound Theory
Which of the following is the largest tectonic plate?
Eurasian Plate
North American Plate
Pacific Plate
African Plate
The seven major tectonic plates are Indo-Australian Plate, South American Plate and:
Pacific Plate
North American Plate
Eurasian Plate
African Plate
Antarctic Plate
According to geologists, how many major tectonic plates and minor tectonic plates** exist on Earth?
10 major plates and 12 minor plates
7 major plates and 10 minor plates
10 major plates and 30 minor plates
3 major plates and 11 minor plates
Which type of boundary occurs when two plates move apart, forming mid-ocean ridges?
(a)
The Himalayas were formed due to the collision of which two tectonic plates?
Pacific and North American Plates
African and Eurasian Plates
Eurasian and Indo-Australian Plates
South American and Pacific Plates
Which type of plate boundary is best exemplified by California’s San Andreas Fault where the North American and Pacific tectonic plates grind past each other?
(a)
At convergent boundaries, what happens to the oceanic crust?
It is preserved unchanged
It is destroyed by subduction
It is converted into continental crust
It turns into sedimentary rocks
The type of plate boundary where geysers gush out super-heated water and magma is called
(a)
Which ground failure occurs when soil temporarily behaves like a liquid during an earthquake?
Ground cracking
Landslides
Soil liquefaction
Surface rupture
Which type of ground failure is most likely to occur in marginally stable sloped land during strong shaking?
Ground cracking
Landslides
Soil liquefaction
Surface rupture
Differential settlement, which can disrupt long foundations, is most commonly caused by:
Surface rupture
Ground subsidence
Landslides
Fault creep
This type of failure produces fissures, scarps, horsts, and grabens.
Surface rupture
Ground subsidence
Ground cracking
Fault creep
Which indirect effect of earthquakes can generate wave run-ups as high as 75 feet, causing severe inland flooding?
Seiches
Fire
Tsunamis
Soil Liquefaction
Which indirect effect occurs in enclosed or partially enclosed bodies of water due to seismic wave resonance?
Seiches
Fire
Tsunamis
Soil Liquefaction
After a large earthquake in a city, gas mains ruptured and oil tanks were destroyed, causing fires that spread uncontrollably because hydrants had no water supply. What indirect effect occurred?
Seiches
Fire
Tsunamis
Soil Liquefaction
Which of the following is NOT a factor that primarily determines the intensity and duration of ground shaking?
Earthquake magnitude
Distance from the focus/epicenter
Weather conditions during the earthquake
Subsurface materials beneath the structure
Which type of subsurface material amplifies seismic shaking?
Soft soils
Hard rocks
Crystalline bedrock
Granite layers
Seismic waves originate from this point where fault rupture occurs
(a)
This is the most insidious of the three factors because the site can be located at a long distance from the epicenter and still experience extensive ground shaking due to this
(a)
The location on the Earth’s surface directly above the focus.
(a)
A city located 200 km away from an earthquake’s epicenter experienced strong shaking and damage because it was built on loose sediments. Which factor contributed most to the damage?
Subsurface materials
Distance from the focus/epicenter
Earthquake size (magnitude)
Two towns experienced the same earthquake. Town A, near the epicenter, experienced collapsed buildings, while Town B, farther away, felt weaker shaking. Which factor explains the difference?
Subsurface materials
Distance from the focus/epicenter
Earthquake size (magnitude)
A magnitude 7.5 earthquake struck a region, causing widespread strong shaking across multiple provinces. Which factor primarily explains this widespread effect?
Subsurface materials
Distance from the focus/epicenter
Earthquake size (magnitude)
Which type of earthquake is most destructive and responsible for major global hazards?
Volcanic
Man-Made
Tectonic
Engineers are studying small earthquakes near a mining site caused by underground explosions. Which type of earthquake are they analyzing?
Volcanic
Man-Made
Tectonic
Scientists detect seismic waves from magma movement beneath a volcano. They use this information to issue an eruption warning. What type of earthquake did they study?
Volcanic
Man-Made
Tectonic
What caused the magnitude 5.0 man-made earthquake in 1968 that shook Las Vegas?
Magma movement
Boxcar nuclear bomb explosion
Fault dislocation
Which earthquake is the strongest ever recorded since 1900, with a magnitude of 9.5?
Sumatra, Indonesia (2004)
Mindanao, Philippines (1924)
Chile (1960)
Japan (2011)
Which earthquake caused the highest number of fatalities since 1900?
Sumatra, Indonesia (2004)
Mindanao, Philippines (1924)
Chile (1960)
Japan (2011)
A belt of seismic activity around the Pacific Ocean where most of the world’s earthquakes occur.
(a)
What type of earthquake occurs at a focal depth of 50 km?
Shallow-focus
Intermediate-focus
Deep-focus
Which type of earthquake generally causes the most damage?
Shallow-focus
Intermediate-focus
Deep-focus
The distance between the epicenter and a seismometer.
(a)
Which type of fault occurs under compressional stress?
Normal fault
Reverse fault
Strike-Slip Faults
Which type of fault occurs under tension stress?
Normal fault
Reverse fault
Strike-Slip Faults
Steep reverse fault, often associated with mountain building.
(a)
What causes rocks on opposite sides of a fault to deform before an earthquake?
Gravity
Shear stress
Volcanic heat
Erosion
After rupture, rocks snap back to nearly their original position. This process is called:
Elastic rebound
Stress accumulation
Elastic deformation
Fault slip
Which of the following shows the correct sequence of the Elastic Rebound process?
Stress → Rupture → Deformation → Rebound → Release
Stress → Deformation → Rupture → Energy Release → Rebound
Deformation → Stress → Rupture → Rebound → Release
Deformation → Rebound → Stress → Rupture → Release
This theory is an explanation
for how energy is released during an
earthquake.
(a)
What type of seismic waves travel through the Earth’s interior and arrive before surface waves?
(a)
What is the maximum ground acceleration experienced during an earthquake called?
(a)
This travel faster than other seismic waves and hence are the first signal from an earthquake to arrive at any affected location or at a seismograph.
Surface Waves
S-Waves
P-waves
______ are transverse waves meaning that the oscillations of the particles of this are perpendicular to the direction of wave propagation, and the main restoring force comes from shear stress
S-waves
P-waves
Surface Waves
What is the range of recorded Peak Ground Acceleration (PGA)?
0.01g to 0.1g
0.2g to 1.0g
1.0g to 2.0g
2.0g to 5.0g
What earthquake measure is a subjective, non-empirical approach based on human observation of damage to buildings, land, and people?
(a)
Earthquake intensity is determined by:
The total energy released at the focus
The amplitude of seismic waves recorded by instruments
Human observations of shaking and structural damage
The depth of the earthquake focus
Which of the following best describes the difference between magnitude and intensity?
Magnitude is subjective, intensity is measured by instruments
Magnitude is measured by instruments, intensity is subjective
Both magnitude and intensity are measured by seismographs
Both magnitude and intensity are subjective
The Moment Magnitude Scale (Mw) is based on which of the following?
Human observation of damage
Amplitude of seismic waves only
Total energy released by an earthquake
Depth of the earthquake focus
In ground motion equations, the constant “a” primarily represents:
Site effects due to local geology
Attenuation scaling, controlling how amplitude decays with distance
Baseline offset due to site and regional effects
Instrument response corrections
The constant “b” in magnitude scaling equations accounts for:
Site effects due to local geology
Attenuation scaling, controlling how amplitude decays with distance
Baseline offset due to site and regional effects
Instrument response corrections
A higher “a” means stronger attenuation over distance.
True
False
Richter working with his colleague Gutenberg addressed the shortcomings of the local magnitude scale by developing the ____-____ _____, to handle deep-focus earthquakes
(a)
Richter working with his colleague Gutenberg addressed the shortcomings of the local magnitude scale by developing the _______-____ _____, to handle distant earthquakes
(a)
The Local Magnitude (ML) scale is also known as:
(a)
What is the main difference between Moment Magnitude (Mw) and Local Magnitude (ML)?
Mw is only used for small, local earthquakes, while ML is used for global, very large earthquakes.
Mw is based on seismic moment (fault rupture area, slip, and rock rigidity), while ML is based on the maximum amplitude of seismic waves.
Mw always gives smaller values than ML for the same earthquake.
Mw measures the intensity of shaking felt by people, while ML measures structural damage.
