Earthquake Risk in Arizona
All Arizona counties ranked by FEMA National Risk Index earthquake score
Earthquake risk — ground shaking from sudden movement along geologic faults — is rated for 15 of 15 Arizona counties in FEMA's National Risk Index. Yuma County carries the state's highest earthquake score at 98.4, with $52M in expected annual earthquake losses.
1 Arizona county is rated High or Very High for earthquake, and expected annual losses from earthquake total roughly $103M 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 | Yuma County | High | 0.09 / yr | $52M | |
| 2 | Maricopa County | Medium | 0.01 / yr | $31M | |
| 3 | Pima County | Medium | 0.01 / yr | $6M | |
| 4 | Coconino County | Medium | 0.00 / yr | $5M | |
| 5 | Mohave County | Low | 0.01 / yr | $2M | |
| 6 | Yavapai County | Low | 0.00 / yr | $2M | |
| 7 | Navajo County | Low | 0.00 / yr | $1M | |
| 8 | Pinal County | Low | 0.00 / yr | $2M | |
| 9 | La Paz County | Low | 0.04 / yr | $801K | |
| 10 | Cochise County | Low | 0.00 / yr | $1M | |
| 11 | Apache County | Low | 0.00 / yr | $371K | |
| 12 | Gila County | Very Low | 0.00 / yr | $278K | |
| 13 | Graham County | Very Low | 0.00 / yr | $185K | |
| 14 | Santa Cruz County | Very Low | 0.00 / yr | $110K | |
| 15 | Greenlee County | Very Low | 0.00 / yr | $34K |
15 Arizona counties with measurable earthquake risk. See the national earthquake ranking or all Arizona counties by overall risk.
Frequently Asked Questions
Which Arizona county has the highest earthquake risk?
Yuma County has the highest FEMA earthquake risk score in Arizona at 98.4 (High), with $52M in expected annual losses and about 0.09 events per year.
How many Arizona counties face significant earthquake risk?
15 Arizona counties record measurable earthquake risk in FEMA's National Risk Index; 1 of them are rated High or Very High.