Question 1

Most large earthquakes result from ________.

Accepted Answer

A) impacts of meteorites from outer space 
B) explosions and detonations of military ordnance especially of nuclear weapons 
C) storm waves and tsunamis crashing onto the shoreline so hard that the earth shakes 
D) the wavelike vibration of the Earth in response to the rapid release of stored elastic energy in deformed rocks 
A) impacts of meteorites from outer space 
B) explosions and detonations of military ordnance especially of nuclear weapons 
C) storm waves and tsunamis crashing onto the shoreline so hard that the earth shakes 
D) the wavelike vibration of the Earth in response to the rapid release of stored elastic energy in deformed rocks

Question 2

What happens inside a rock as a wave front from a P wave passes through?

Accepted Answer

A) The little parcel of rock rotates about its own location in an ellipse until the wave passes. 
B) The little parcel of rock shimmies from side to side as the wave passes, with the greatest motion at the Earth's surface, dying out with depth. 
C) The volume of the rock stays fixed, but it shears back and forth, distorting the rock's internal shape as the wave passes through. 
D) The rock moves toward and away from the earthquake as the volume of the material alternately expands and contracts, changing the rock's density while the compression-rarefaction wave passes through. 
A) The little parcel of rock rotates about its own location in an ellipse until the wave passes. 
B) The little parcel of rock shimmies from side to side as the wave passes, with the greatest motion at the Earth's surface, dying out with depth. 
C) The volume of the rock stays fixed, but it shears back and forth, distorting the rock's internal shape as the wave passes through. 
D) The rock moves toward and away from the earthquake as the volume of the material alternately expands and contracts, changing the rock's density while the compression-rarefaction wave passes through.

Question 3

Based on fault measurements, the 1960 Chilean earthquake had a Moment Magnitude MW = 9.5 and was probably the largest earthquake ever measured.

Accepted Answer

A) True 
 B)False

Question 4

What is an earthquake?

Accepted Answer

The wavelike vibrati

Question 5

The Richter earthquake magnitude scale is based on the total amount of energy released by the earthquake, as measured on a seismograph.

Accepted Answer

A) True 
 B)False

Question 6

Horizontal vibrations, such as induced by strike-slip faulting, S-waves and some types of surface waves are generally much more dangerous to tall buildings than vertical up and down ground shaking.

Accepted Answer

A) True 
 B)False

Question 7

If an earthquake occurred 2000 km away from a seismic station, how long after the earthquake would the station detect the P-wave arrival?

Accepted Answer

A) 4 minutes 
B) 2 minutes 
C) 7.5 minutes 
D) 2000 minutes 
A) 4 minutes 
B) 2 minutes 
C) 7.5 minutes 
D) 2000 minutes

Question 8

What is the main contribution of Canada's Lithoprobe Project?

Accepted Answer

A) discovering Canada's richest mineral deposits at the base of the crust 
B) drilling deep holes to probe the Canadian lithosphere and explore for hydrocarbons along the way 
C) multichannel reflection seismic profiling of the entire crustal architecture, to the base of the lithosphere 
D) radiometric dating of the oldest rocks laid down at the base of the lithosphere 
A) discovering Canada's richest mineral deposits at the base of the crust 
B) drilling deep holes to probe the Canadian lithosphere and explore for hydrocarbons along the way 
C) multichannel reflection seismic profiling of the entire crustal architecture, to the base of the lithosphere 
D) radiometric dating of the oldest rocks laid down at the base of the lithosphere

Question 9

Give two reasons why Moment Magnitude (MW )is a better measure of an earthquake's energy than ML for geologists and engineers.

Accepted Answer

1)This is the only adequate energy measu

Question 10

The Mercalli earthquake intensity scale uses Roman numerals from I to XII, XII being the highest intensity.

Accepted Answer

A) True 
 B)False

Question 11

An earthquake of magnitude 6.5 releases about how much more energy than one of magnitude 5.5?

Accepted Answer

The answer of An earthquake of magnitude 6.5 releases about...

Question 12

________ are the first to arrive at distant seismic stations.

Accepted Answer

The answer of ________ are the first to arrive at...

Question 13

What secondary event associated with the 1906 San Francisco earthquake was even more damaging than the ground shaking?

Accepted Answer

The answer of What secondary event associated with the 1906...

Question 14

What is the average S-wave velocity (km/sec)if the seismic station is 2000 km from the epicentre?

Accepted Answer

A) 4.38 
B) 263 
C) 43.8 
D) 4.66 
A) 4.38 
B) 263 
C) 43.8 
D) 4.66

Question 15

How can seismic waves that follow longer, deeper, curved ray paths arrive at a distant station before the more direct straight-line shallow paths?

Accepted Answer

The deeper layers are denser a

Question 16

If an earthquake occurred 2000 km away from a seismic station, how long after the P-wave arrival would the station detect the S-wave arrival on the same seismogram?

Accepted Answer

A) 3.6 minutes 
B) 2 minutes 
C) 4 minutes 
D) 7.6 minutes 
A) 3.6 minutes 
B) 2 minutes 
C) 4 minutes 
D) 7.6 minutes

Question 17

Energy is stored in rocks adjacent to the site of a future earthquake as ________.

Accepted Answer

A) elastic stress 
B) ballistic shock waves 
C) thermal vibrations 
D) plastic strain 
A) elastic stress 
B) ballistic shock waves 
C) thermal vibrations 
D) plastic strain

Question 18

The rupture zones associated with great earthquakes, tend to occur adjacent to one another, without any appreciable overlap, tracing out a plate boundary.

Accepted Answer

A) True 
 B)False

Question 19

Liquefaction and failure occurs where unconsolidated sedimentary materials are saturated with water.

Accepted Answer

A) True 
 B)False

Question 20

For a shallow-focus earthquake, the hypocentre and epicentre are virtually coincident, especially as detected at distant seismograph stations.

Accepted Answer

A) True 
 B)False

Most large earthquakes result from ________.

What happens inside a rock as a wave front from a P wave passes through?

Based on fault measurements, the 1960 Chilean earthquake had a Moment Magnitude MW = 9.5 and was probably the largest earthquake ever measured.

What is an earthquake?

The Richter earthquake magnitude scale is based on the total amount of energy released by the earthquake, as measured on a seismograph.

Horizontal vibrations, such as induced by strike-slip faulting, S-waves and some types of surface waves are generally much more dangerous to tall buildings than vertical up and down ground shaking.

If an earthquake occurred 2000 km away from a seismic station, how long after the earthquake would the station detect the P-wave arrival?

What is the main contribution of Canada's Lithoprobe Project?

Give two reasons why Moment Magnitude (MW )is a better measure of an earthquake's energy than ML for geologists and engineers.

The Mercalli earthquake intensity scale uses Roman numerals from I to XII, XII being the highest intensity.

An earthquake of magnitude 6.5 releases about how much more energy than one of magnitude 5.5?

________ are the first to arrive at distant seismic stations.

What secondary event associated with the 1906 San Francisco earthquake was even more damaging than the ground shaking?

What is the average S-wave velocity (km/sec)if the seismic station is 2000 km from the epicentre?

How can seismic waves that follow longer, deeper, curved ray paths arrive at a distant station before the more direct straight-line shallow paths?

If an earthquake occurred 2000 km away from a seismic station, how long after the P-wave arrival would the station detect the S-wave arrival on the same seismogram?

Energy is stored in rocks adjacent to the site of a future earthquake as ________.

The rupture zones associated with great earthquakes, tend to occur adjacent to one another, without any appreciable overlap, tracing out a plate boundary.

Liquefaction and failure occurs where unconsolidated sedimentary materials are saturated with water.

For a shallow-focus earthquake, the hypocentre and epicentre are virtually coincident, especially as detected at distant seismograph stations.

An Introduction to Geology and Plate Tectonics

Minerals: The Building Blocks of Rocks

Igneous Rocks

Volcanoes and Volcanic Processes

Weathering and Soil

Sedimentary Rocks

Metamorphism and Metamorphic Rocks

Geologic Time

Crustal Deformation

The Ocean Floor

Plate Tectonics: The Framework for Modern Geology

Mountain Building and Continental Frameworks

Mass Wasting: The Work of Gravity

Running Water

Groundwater

Glaciers and Glaciation

Deserts and Winds

Shorelines

Mineral and Energy Resources

Filters

Exam 10: Earthquakes and Earth's Interior

Most large earthquakes result from ________.

What happens inside a rock as a wave front from a P wave passes through?

Based on fault measurements, the 1960 Chilean earthquake had a Moment Magnitude MW = 9.5 and was probably the largest earthquake ever measured.

What is an earthquake?

The Richter earthquake magnitude scale is based on the total amount of energy released by the earthquake, as measured on a seismograph.

Horizontal vibrations, such as induced by strike-slip faulting, S-waves and some types of surface waves are generally much more dangerous to tall buildings than vertical up and down ground shaking.

If an earthquake occurred 2000 km away from a seismic station, how long after the earthquake would the station detect the P-wave arrival?

What is the main contribution of Canada's Lithoprobe Project?

Give two reasons why Moment Magnitude (MW )is a better measure of an earthquake's energy than ML for geologists and engineers.

The Mercalli earthquake intensity scale uses Roman numerals from I to XII, XII being the highest intensity.

An earthquake of magnitude 6.5 releases about how much more energy than one of magnitude 5.5?

________ are the first to arrive at distant seismic stations.

What secondary event associated with the 1906 San Francisco earthquake was even more damaging than the ground shaking?

What is the average S-wave velocity (km/sec)if the seismic station is 2000 km from the epicentre?

How can seismic waves that follow longer, deeper, curved ray paths arrive at a distant station before the more direct straight-line shallow paths?

If an earthquake occurred 2000 km away from a seismic station, how long after the P-wave arrival would the station detect the S-wave arrival on the same seismogram?

Energy is stored in rocks adjacent to the site of a future earthquake as ________.

The rupture zones associated with great earthquakes, tend to occur adjacent to one another, without any appreciable overlap, tracing out a plate boundary.

Liquefaction and failure occurs where unconsolidated sedimentary materials are saturated with water.

For a shallow-focus earthquake, the hypocentre and epicentre are virtually coincident, especially as detected at distant seismograph stations.

An Introduction to Geology and Plate Tectonics

Minerals: The Building Blocks of Rocks

Igneous Rocks

Volcanoes and Volcanic Processes

Weathering and Soil

Sedimentary Rocks

Metamorphism and Metamorphic Rocks

Geologic Time

Crustal Deformation

The Ocean Floor

Plate Tectonics: The Framework for Modern Geology

Mountain Building and Continental Frameworks

Mass Wasting: The Work of Gravity

Running Water

Groundwater

Glaciers and Glaciation

Deserts and Winds

Shorelines

Mineral and Energy Resources

Filters