Region
United States
2,258
Atlantic Coast (U.S.)
16
California
8
Canada
5
West (U.S.)
5
Europe
4
Florida
4
Missouri
4
Pacific Coast (U.S.)
4
China
3
Colorado
3
Grand Valley (Colo. and Utah)
3
United States Virgin Islands
3
Alabama
2
Alaska
2
Black Hills (S.D. and Wyo.)
2
Connecticut
2
Georgia
2
Great Basin
2
Los Angeles
2
Maryland
2
Massachusetts
2
Mexico
2
Mid-Atlantic Bight
2
Oregon
2
Saint Louis
2
Saint Louis (Mo.)
2
South Atlantic Bight
2
Southwestern States
2
Wasatch Fault Zone (Utah and Idaho)
2
Washington (State)
2
Afghanistan
1
Africa, East
1
Albany
1
Allegheny Mountains
1
Arctic regions
1
Atlanta
1
Atlantic Coast (New England)
1
Atlantic Coast (North America)
1
Atlantic Coast (United States and Canada)
1
Atlantic Ocean
1
Atlantic States
1
Austin
1
Australia
1
Baltimore
1
Bering Sea
1
Birmingham
1
Bosnia and Herzegovina
1
Caribbean Area
1
Chicago
1
more ...