Region
Alaska
37
California
16
Nevada
15
Colorado
9
United States
8
Utah
8
Arizona
6
Iron County
6
Nebraska
6
Michigan
4
New Mexico
4
Antarctica
3
Canada
3
Clinton County
3
Cook Inlet
3
Earth (Planet)
3
Idaho
3
Kansas
3
New York (State)
3
Alaska, Gulf of
2
Amchitka Island
2
Cholame Region
2
Colorado Plateau
2
Copper River Watershed
2
Custer County
2
Fairbanks region
2
Florida
2
Howard County
2
India
2
Indiana
2
Leadville Region
2
Maine, Gulf of
2
Mineral County
2
Mojave Desert
2
Mono County
2
Oregon
2
Puerto Rico
2
Red Willow County
2
San Andreas Fault (Calif.)
2
Soda Springs Region
2
Virgin River Valley
2
Washington (State)
2
Yakima River Watershed
2
Afghanistan
1
Albuquerque
1
Amargosa River Valley (Nev. and Calif.)
1
Bonner County
1
Boulder
1
Burney
1
California, Northern
1
more ...