Region
United States
217
Ukraine
8
Washington (State)
7
Marshall Islands
6
West (U.S.)
6
Pennsylvania
5
Sun
5
Hanford Site (Wash.)
4
Harrisburg Region
4
India
4
Japan
4
Karshi-Khanabad Air Base
4
Karshi-Khanabad Air Base (Uzbekistan)
4
Ohio
4
Uzbekistan
4
Chornobylʹ
3
Cincinnati
3
Europe, Eastern
3
Hanford
3
Navajo Indian Reservation
3
Nevada
3
Southwest, New
3
Antarctica
2
Arizona
2
Belarus
2
California
2
England
2
Hanford Site
2
Hiroshima-shi (Japan)
2
Jupiter (Planet)
2
Oregon
2
Solar system
2
Soviet Union
2
Tennessee
2
Utah
2
Canada
1
Caspian Sea Region
1
Chornobyl
1
Chornobylʹ (Ukraine)
1
Clark County
1
Colombia
1
Colorado
1
Edwards Aquifer
1
Edwards Aquifer (Tex.)
1
Estonia
1
Etats-Unis
1
Europa (Satellite)
1
Fernald
1
Florida
1
Fukushima-ken
1
more ...