Alaska earthquake risk
Anchorage Municipality has the highest earthquake risk in Alaska, scoring 99.5 out of 100 — rated "Relatively High" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Anchorage Municipality | 99.5 | Relatively High |
| 2 | Matanuska-Susitna Borough | 98.9 | Relatively High |
| 3 | Kenai Peninsula Borough | 98.7 | Relatively High |
| 4 | Fairbanks North Star Borough | 97.6 | Relatively Moderate |
| 5 | Kodiak Island Borough | 94.7 | Relatively Moderate |
| 6 | Aleutians West Census Area | 89.7 | Relatively Low |
| 7 | Southeast Fairbanks Census Area | 86.5 | Relatively Low |
| 8 | Sitka City and Borough | 83.9 | Relatively Low |
| 9 | Chugach Census Area | 81.8 | Relatively Low |
| 10 | Juneau City and Borough | 80.5 | Relatively Low |
| 11 | Lake and Peninsula Borough | 79.7 | Relatively Low |
| 12 | Denali Borough | 78.9 | Relatively Low |
| 13 | Copper River Census Area | 77.8 | Relatively Low |
| 14 | Yakutat City and Borough | 77.4 | Relatively Low |
| 15 | Yukon-Koyukuk Census Area | 75.3 | Relatively Low |
| 16 | Dillingham Census Area | 75 | Relatively Low |
| 17 | Aleutians East Borough | 74.6 | Relatively Low |
| 18 | Nome Census Area | 73.5 | Relatively Low |
| 19 | Hoonah-Angoon Census Area | 73.2 | Relatively Low |
| 20 | Bristol Bay Borough | 71.9 | Relatively Low |
| 21 | Northwest Arctic Borough | 65.7 | Relatively Low |
| 22 | Haines Borough | 64.5 | Relatively Low |
| 23 | North Slope Borough | 50.2 | Very Low |
| 24 | Bethel Census Area | 49.4 | Very Low |
| 25 | Skagway Municipality | 43.9 | Very Low |
| 26 | Prince of Wales-Hyder Census Area | 43 | Very Low |
| 27 | Ketchikan Gateway Borough | 31.2 | Very Low |
| 28 | Kusilvak Census Area | 24.6 | Very Low |
| 29 | Petersburg Borough | 18.3 | Very Low |
| 30 | Wrangell City and Borough | 13 | Very Low |
Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.
Earthquake risk nationally:
Other hazard risks in Alaska:
Frequently asked questions
What is the highest earthquake risk county in Alaska?
Anchorage Municipality, AK has the highest earthquake risk in Alaska, with a FEMA National Risk Index score of 99.5 out of 100 (rated "Relatively High").
What causes earthquake risk in Alaska?
Earthquake risk reflects expected annual losses from ground shaking. High scores concentrate in California, the Pacific Northwest, Alaska, and the New Madrid Seismic Zone (spanning Missouri, Arkansas, Tennessee, and neighboring states). NOAA's Storm Events Database does not track earthquakes, so recorded event counts are not shown.