If a magnitude 7.5 quake were to occur in the Salt Lake City area, the commission predicts there would be some 7,600 deaths and $18 billion in physical damage, loss of jobs and economic activity.
The Great Shake Out website details strategies to stay safe during and after an earthquake. As a general guideline, the Shake Out encourages people who are indoors to drop to the ground, take cover by getting under a sturdy desk or table, and hold on to it until the shaking stops.
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Impact from a major quake
Injuries and deaths from a major quake
The number of injuries and deaths would depend on the time of day of the earthquake. The Utah Division of Homeland Security ran the scenario of a 7.0 temblor hitting Salt Lake County at a time when everyone is home, everyone is at work, and when people are commuting.
Level 1: scrapes and bruises
Level 2: hospitalization with non-life-threatening injuries
Level 3: life-threatening injuries
Level 4: fatalities
Level 1: 31,430
Level 2: 9,360
Level 3: 1,480
Level 4: 2,920
Level 1: 22,830
Level 2: 7,060
Level 3: 1,200
Level 4: 2,290
Level 1: 23,520
Level 2: 7,790
Level 3: 2,290
Level 4: 2,450