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– If I told you that the Wasatch Fault dips west beneath Utah Valley at 65 degre

ID: 158942 • Letter: #

Question

– If I told you that the Wasatch Fault dips west beneath Utah Valley at 65 degrees and the hypocenter of the next Provo segment Earthquake was 10km deep at the latitude of Sherwood Hills Landslide on the Provo segment of the fault, please do the trigonometry to determine how far from the mountain front the epicenter would be. Where in the valley does this coincide? Seismic energy attenuates away from faults during the rupture, but the highest shaking is usually within 10 km of the fault rupture. Assuming a full Provo segment rupture, what places in the Salt Lake City metropolitan area are far enough from the fault, say 40km, that they would have relatively modest shaking with relatively little chance for major damage?

Explanation / Answer

– If I told you that the Wasatch Fault dips west beneath Utah Valley at 65 degre