Weeks after big earthquake, Wasatch fault system comes into sharper focus, thanks to new study

An inconvenient geological truth is staring at the Intermountain West. One of its most densely populated metropolitan area happens to also be its most seismically unstable, raising the possibility — some would say inevitability — of catastrophic loss of life and economic upheaval in the event of a major earthquake.A network of fissures, known as the Wasatch fault zone, runs 220 miles from central Utah north along the Wasatch Front through Salt Lake City into Idaho, a region with as m