Definition of "earth tremor" []

• A small earthquake, or seismic event. (noun)

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• "November at one o'clock in the morning, there was a powerful earth tremor felt in New Orleans; some of the buildings in the black areas collapsed; people ran out onto the street in panic, but there was no second tremor; there was only a short, howling cyclone that struck with a sudden furious onslaught, smashing windows and blowing the rooves off the houses where the negroes lived; a few dozen people were killed; and then there was a heavy downpour of mud."
• "It was a thing of arches and windows balanced on an outcrop of striated rock, and looked as if the slightest earth tremor would flip it whole into the valley below; nonetheless, it was a lovely setting, for there was water here, perennial water, and if the higher reaches of the wadi were the standard mixture of rock and scrub, down here there were trees — not a great number, true, but they were actual, recognisable trees."