Answer:
C. shallow and occur in the upper 15 to 20 km of crust, even though the San Andreas fault cuts through the crust to deeper depths.
Explanation:
Earthquakes in California usually occur in the upper 15 to 20 km of crust. This is the case even though the San Andreas fault cuts through the crust to deeper depths. The San Andreas fault extends roughly 1,200 kilometers through California, and it forms the tectonic boundary between the Pacific Plate and the North American plate. It is believed that there is significant risk of a major earthquake (greater than 7.0) along this fault, particularly in the southern section of the fault, which is the region along Los Angeles.
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