Earthquake Risk in Utah
All Utah counties ranked by FEMA National Risk Index earthquake score
Earthquake risk — ground shaking from sudden movement along geologic faults — is rated for 29 of 29 Utah counties in FEMA's National Risk Index. Salt Lake County carries the state's highest earthquake score at 99.6, with $488M in expected annual earthquake losses.
2 Utah counties are rated High or Very High for earthquake, and expected annual losses from earthquake total roughly $869M statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Earthquake
| # | County | Earthquake Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Salt Lake County | High | 0.02 / yr | $488M | |
| 2 | Utah County | High | 0.01 / yr | $163M | |
| 3 | Davis County | Medium | 0.02 / yr | $89M | |
| 4 | Weber County | Medium | 0.02 / yr | $66M | |
| 5 | Cache County | Medium | 0.01 / yr | $19M | |
| 6 | Box Elder County | Medium | 0.01 / yr | $16M | |
| 7 | Sevier County | Low | 0.02 / yr | $4M | |
| 8 | Iron County | Low | 0.01 / yr | $4M | |
| 9 | Tooele County | Low | 0.01 / yr | $4M | |
| 10 | Sanpete County | Low | 0.01 / yr | $2M | |
| 11 | Millard County | Low | 0.01 / yr | $2M | |
| 12 | Washington County | Low | 0.01 / yr | $2M | |
| 13 | Juab County | Low | 0.01 / yr | $2M | |
| 14 | Beaver County | Low | 0.01 / yr | $1M | |
| 15 | Emery County | Low | 0.01 / yr | $613K | |
| 16 | Carbon County | Low | 0.01 / yr | $623K | |
| 17 | Garfield County | Low | 0.01 / yr | $510K | |
| 18 | Duchesne County | Low | 0.01 / yr | $621K | |
| 19 | Wasatch County | Very Low | 0.01 / yr | $667K | |
| 20 | Uintah County | Very Low | 0.00 / yr | $535K | |
| 21 | San Juan County | Very Low | 0.00 / yr | $211K | |
| 22 | Summit County | Very Low | 0.01 / yr | $670K | |
| 23 | Piute County | Very Low | 0.01 / yr | $274K | |
| 24 | Wayne County | Very Low | 0.01 / yr | $230K | |
| 25 | Kane County | Very Low | 0.00 / yr | $148K | |
| 26 | Rich County | Very Low | 0.01 / yr | $171K | |
| 27 | Morgan County | Very Low | 0.01 / yr | $186K | |
| 28 | Grand County | Very Low | 0.00 / yr | $101K | |
| 29 | Daggett County | Very Low | 0.00 / yr | $25K |
29 Utah counties with measurable earthquake risk. See the national earthquake ranking or all Utah counties by overall risk.
Frequently Asked Questions
Which Utah county has the highest earthquake risk?
Salt Lake County has the highest FEMA earthquake risk score in Utah at 99.6 (High), with $488M in expected annual losses and about 0.02 events per year.
How many Utah counties face significant earthquake risk?
29 Utah counties record measurable earthquake risk in FEMA's National Risk Index; 2 of them are rated High or Very High.