Friday, February 5, 2010

Which statement about the focus of an earthquake is false?

A An earthquake's focus is usually beneath the earthquake's epicenter.


B Along a divergent boundary, an earthquake's focus can be as much as 700 kilometers beneath Earth's surface.


C Energy travels outward from an earthquake's focus.


D The focus is the point at which rock begins to move or break.Which statement about the focus of an earthquake is false?
B.





Deep earthquakes only occur at convergent boundaries where there is subduction; deep focus earthquakes (300-700 km) occur within the subducting slab. At divergent boundaries we would only expect shallow source earthquakes.Which statement about the focus of an earthquake is false?
B
C Energy travels outward from an earthquake's focus.
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