Earthquake Risk in New Hampshire
All New Hampshire counties ranked by FEMA National Risk Index earthquake score
Earthquake risk — ground shaking from sudden movement along geologic faults — is rated for 10 of 10 New Hampshire counties in FEMA's National Risk Index. Hillsborough County carries the state's highest earthquake score at 88.2, with $6M in expected annual earthquake losses.
No New Hampshire county reaches the High band for earthquake, and expected annual losses from earthquake total roughly $17M 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 | Hillsborough County | Low | 0.00 / yr | $6M | |
| 2 | Rockingham County | Low | 0.00 / yr | $5M | |
| 3 | Strafford County | Low | 0.00 / yr | $2M | |
| 4 | Merrimack County | Low | 0.00 / yr | $2M | |
| 5 | Grafton County | Low | 0.00 / yr | $848K | |
| 6 | Carroll County | Low | 0.00 / yr | $560K | |
| 7 | Belknap County | Low | 0.00 / yr | $550K | |
| 8 | Cheshire County | Very Low | 0.00 / yr | $522K | |
| 9 | Coos County | Very Low | 0.00 / yr | $222K | |
| 10 | Sullivan County | Very Low | 0.00 / yr | $235K |
10 New Hampshire counties with measurable earthquake risk. See the national earthquake ranking or all New Hampshire counties by overall risk.
Frequently Asked Questions
Which New Hampshire county has the highest earthquake risk?
Hillsborough County has the highest FEMA earthquake risk score in New Hampshire at 88.2 (Low), with $6M in expected annual losses and about 0.00 events per year.
How many New Hampshire counties face significant earthquake risk?
10 New Hampshire counties record measurable earthquake risk in FEMA's National Risk Index; 0 of them are rated High or Very High.