Salt Lake City lies in the Great Salt Lake Basin — the floor of the ancient Lake Bonneville. Ground motion caused by earthquakes moves quickly through this vast sedimentary basin. Credit: Garrett, CC BY 2.0

Salt Lake City lies in the Great Salt Lake Basin — the floor of the ancient Lake Bonneville. Ground motion caused by earthquakes moves quickly through this vast sedimentary basin. Credit: Garrett, CC BY 2.0

Salt Lake City lies in the Great Salt Lake Basin — the floor of the ancient Lake Bonneville. Ground motion caused by earthquakes moves quickly through this vast sedimentary basin. Credit: Garrett, CC BY 2.0

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