Why are deep focus earthquakes much less common than shallow and intermediate focus earthquakes?
A. Rocks at this depth behave in a ductile manner, not in a brittle manner.
B. The primary waves from deep earthquakes cancel out the secondary waves.
C. Past the depth of 350 kilometers in the crust, most rocks are molten.
D. They may be as common, but we don't have the technology to record deep earthquakes.
Answer: A
You might also like to view...
Which ocean is actually a part of three other oceans?
A) The Pacific Ocean B) The Atlantic Ocean C) The Indian Ocean D) The Arctic Ocean E) The Southern Ocean
Where would you most likely find contact metamorphism?
A. Associated with a volcano B. Associated with a fault C. Associated with a mountain belt
Which of the following contains a modern continental rift?
A. eastern North America B. East Timor C. eastern Africa D. eastern Europe E. eastern Pacific Ocean
Describe the important aspects of atmospheric absorption, reflection, scattering, and transmission of light
What will be an ideal response?