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33658 Studies found for: value
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Map Legend
Region Name Number of Studies
World 33,658
Africa [map] 1,204
Central America [map] 611
East Asia [map] 4,340
Japan 1,083 [studies]
Europe [map] 12,020
Middle East [map] 1,707
North America 14,331
Canada [map] 2,897 [studies]
Mexico 859 [studies]
United States [map] 12,899 [studies]
North Asia [map] 1,327
Pacifica [map] 1,319
South America [map] 1,791
South Asia [map] 708
Southeast Asia [map] 914

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Click on a [studies] link to search within your current results for studies in that region. Use the back button to return to this list and try another region.

Studies with no locations are not included in the counts or on the map.

Studies with multiple locations are included in each region containing locations.