11. Lassen volcanic center, California
> Overall threat score: 153
> Population within 30 km (approx. 18 miles): 2,340
> Population within 100 km (approx. 30 miles): 439,135
> Most recent eruption year: 1917
10. Mount Spurr, Cook Inlet, Alaska
> Overall threat score: 161
> Population within 30 km (approx. 18 miles): Not available
> Population within 100 km (approx. 30 miles): 11,097
> Most recent eruption year: 1992
9. Makushin Volcano, Aleutian Islands, Alaska
> Overall threat score: 161
> Population within 30 km (approx. 18 miles): 3,437
> Population within 100 km (approx. 30 miles): 3,850
> Most recent eruption year: 1995
8. Akutan Island, Aleutian Islands, Alaska
> Overall threat score: Aleutian Islands, Alaska
> Population within 30 km (approx. 18 miles): 233
> Population within 100 km (approx. 30 miles): 4,361
> Most recent eruption year: 1992
7. Three Sisters, Cascade Volcanic Arc, Oregon
> Overall threat score: 165
> Population within 30 km (approx. 18 miles): 5,672
> Population within 100 km (approx. 30 miles): 279,885
> Most recent eruption year: 440
