Postcards from Lake Tahoe all flaunt a peaceful, brilliant-blue stretch of mountain water. But geologists have been snapping a very different picture of the lake lately. Far beneath Lake Tahoe’s gentle surface, they say, several hidden earthquake faults snake across the lake’s flat bottom. These faults put the lake at a bizarre risk for an inland body of water.
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If the researchers are right, Lake Tahoe tourists could one day feel the ground tremble and, just minutes later, face a tsunami. Roiling waves of water would crest to 10 meters at the shore and crisscross the lake for hours.