Answer:
The P wave usually is not the damaging wave. It is the shear or “S” wave energy that travels slower, at about 6,000 mph. S waves arrive last, and these do the damage. The writer is a professor emeritus of geophysics at UC Santa Barbara.
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Answer:
The P wave usually is not the damaging wave. It is the shear or “S” wave energy that travels slower, at about 6,000 mph. S waves arrive last, and these do the damage. The writer is a professor emeritus of geophysics at UC Santa Barbara.