Two earthquakes of magnitudes over 2.5 were reported shortly after 6pm local time (midnight Eastern Time) hit Christmas Island.
Camping, a civil engineer who once ran his own construction business, plans to spend the day with his wife in Alameda, in northern California, and watch doomsday unfold on television.
'I'll probably try to be very near a TV or a radio or something,' he said.
'I'll be interested in what's happening on the other side of the world as this begins.'
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