Select different State:
Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware District of Columbia Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming| Ikathiwik Crater | Ikathiwik Crater | Bethel (CA) | 472 | Nunivak Island A-4 |
| Aniakchak Crater | Aniakchak Crater | Lake and Peninsula | 1355 | Chignik D-1 |
| Binalik Crater | Binalik Crater | Bethel (CA) | 591 | Nunivak Island A-4 |
| Mount Wrangell Crater | Mount Wrangell Crater | Valdez-Cordova (CA) | 13615 | Valdez D-1 |
| Nanwaksjiak Crater | Nanwaksjiak Crater | Bethel (CA) | 594 | Nunivak Island A-3 |
| Novarupta | Novarupta | Lake and Peninsula | 2743 | Mount Katmai B-4 |
| Twin Calderas | Twin Calderas | Nome (CA) | 1601 | Bendeleben B-3 |
| Kaguyak Crater | Kaguyak Crater | Kodiak Island | 1161 | Mount Katmai C-1 |
| Ukinrek Maars | Ukinrek Maars | Lake and Peninsula | 138 | Ugashik D-2 |
| North Crater | North Crater | Valdez-Cordova (CA) | 13350 | Gulkana A-1 |
| East Crater | East Crater | Valdez-Cordova (CA) | 13773 | Nabesna A-6 |
| Fisher Caldera | Fisher Caldera | Aleutians East | 571 | Unimak C-2 |
| Okmok Caldera | Okmok Caldera | Aleutians West (CA) | 1201 | Umnak B-1 |