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Classroom, Lab and Field Exercises in Geophysics

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ConcepTest: Oceans by South America #5 part of Cutting Edge:Teaching Methods:ConcepTests:Examples
Examine the image of part of the South American continent and neighboring oceans. (Image courtesy the National Geophysical Data Center.) Which site is located nearest to a trench? a. D b. B c. C d. A

ConcepTest: Characteristics of the Ocean Floor part of Cutting Edge:Teaching Methods:ConcepTests:Examples
What is the relationship between age and the character of the ocean floor? Which statement is TRUE? a. Deeper regions of the ocean floor tend to be younger b. The Pacific is larger than the Atlantic because it ...

ConcepTest: Location of Deep Earthquakes part of Cutting Edge:Teaching Methods:ConcepTests:Examples
Where will deep earthquakes occur most frequently in the plate tectonic setting shown below?

ConcepTest: Shock Sequences part of Cutting Edge:Teaching Methods:ConcepTests:Examples
A seismograph records four earthquakes of magnitude 3.7, 3.2, 6.5 and 4.3 and then seismicity decreases. Which is a likely foreshock /aftershock sequence? a. 3.7, 3.2/6.5 b. 3.2, 6.5/4.3 c. 3.2, 3.7/4.3 d. 6.5/4.3

ConcepTest: Foreshock part of Cutting Edge:Teaching Methods:ConcepTests:Examples
A seismograph records four earthquakes of magnitude 3.7, 3.2, 6.5 and 4.3 and then seismicity decreases. Which earthquake(s) represent (a) foreshock(s)? a. 3.7 and 3.2 b. 3.2 only c. 3.7 only d. 3.7 and 6.5

ConcepTest: EQ Recurrence Interval part of Cutting Edge:Teaching Methods:ConcepTests:Examples
Plate A moves 3 cm/yr past plate B. A typical earthquake along the plate boundary has 6 meters of slip. What is the recurrence interval of the earthquake? a. 0.2 years b. 2 years c. 200 years d. 2000 years

ConcepTest: Mercalli Intensity part of Cutting Edge:Teaching Methods:ConcepTests:Examples
In 1872, 25 people were killed in Lone Pine when their adobe homes collapsed during an earthquake. What was the Mercalli Intensity of the earthquake? a. I - III b. IVVI c. VIIX d. XIXII

ConcepTest: Find the Epicenter part of Cutting Edge:Teaching Methods:ConcepTests:Examples
An earthquake occurred on the Erie Fault 5 km below Ashtabula. Damage from the earthquake was greatest in nearby Chardon. The furthest report of shaking was recorded in Akron. Where was the earthquake's ...

ConcepTest: Intensity and Magnitude part of Cutting Edge:Teaching Methods:ConcepTests:Examples
Three sites (L1, L2, L3) record earthquake intensity and earthquake magnitude for the same earthquake. L1 is located closest to the focus and L3 is farthest away. The intensity values are greatest at _____ and the ...

ConcepTest: Earthquake Hazards part of Cutting Edge:Teaching Methods:ConcepTests:Examples
If you lived in a city located 20 km from the epicenter of a magnitude 6.7 earthquake, which of the following would you be most likely to experience? a) ground shaking b) landslides c) fault rupture d) tsunami e) ...

ConcepTest: Magnitude part of Cutting Edge:Teaching Methods:ConcepTests:Examples
What determines the magnitude of an earthquake? a) The type of plate boundary where the earthquake occurs. b) The amount of energy released by the movement on a fault. c) The amount of damage that occurs as a ...

ConcepTest: Earthquake Location and Magnitude part of Cutting Edge:Teaching Methods:ConcepTests:Examples
Two active faults are present at different sites along the west coast of North America. The rate of plate motion adjacent to location X is 2 cm/year. The rate of plate motion adjacent to location Y is 5 cm/year. A ...

ConcepTest: S Wave Speed part of Cutting Edge:Teaching Methods:ConcepTests:Examples
The city of Guildhall experienced two earthquakes within a 1-month interval. The first earthquake was magnitude 2; the second earthquake was magnitude 7. The S-waves from the magnitude 2 earthquake travel ...

ConcepTest: S Wave Amplitude part of Cutting Edge:Teaching Methods:ConcepTests:Examples
The city of Guildhall experienced two earthquakes within a 1-month interval. The first earthquake was magnitude 2; the second earthquake was magnitude 7. Examination of a seismogram recorded 100 km away showed that ...

ConcepTest: Divergent Boundary Sketch part of Cutting Edge:Teaching Methods:ConcepTests:Examples
The figure below was drawn by a student to show the relationship between earthquake epicenters (filled circles) and a divergent plate boundary (red line). The figure represents a boundary between two oceanic ...

ConcepTest: P Wave Arrival part of Cutting Edge:Teaching Methods:ConcepTests:Examples
Examine the seismogram below that shows a 26-minute long record of the seismic waves from the 1906 San Francisco earthquake as it was received by a seismograph station in Germany, over 14,000 km away. Which letter ...

ConcepTest: S Wave Arrival part of Cutting Edge:Teaching Methods:ConcepTests:Examples
Examine the seismogram below that shows a 26-minute long record of the seismic waves from the 1906 San Francisco earthquake as it was received by a seismograph station in Germany, over 14,000 km away. Which letter ...

ConcepTest: P and S Waves part of Cutting Edge:Teaching Methods:ConcepTests:Examples
Examine the seismogram below that shows a 26-minute long record of the seismic waves from the 1906 San Francisco earthquake as it was received by a seismograph station in Germany, over 14,000 km away. Approximately ...

ConcepTest: Seismic Waves #1 part of Cutting Edge:Teaching Methods:ConcepTests:Examples
Examine the diagram below that shows a cut-away view of a section of Earth's crust containing a fault. Answer the question below assuming that an earthquake originated at the focus shown on the fault surface. ...

ConcepTest: EQ Distribution, North America part of Cutting Edge:Teaching Methods:ConcepTests:Examples
Which of the maps below best represents the distribution of magnitude 6 or greater earthquakes in North America within a decade? a. b. c. d.