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110136 Studies found for: Change in
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Map Legend
Region Name Number of Studies
World 110,136  
Africa   [map]   2,934  
Central America   [map]   1,433  
East Asia   [map]   12,367  
Japan 2,562   [studies]
Europe   [map]   31,671  
Middle East   [map]   4,489  
North America 52,841  
Canada   [map]   9,103   [studies]
Mexico 1,871   [studies]
United States   [map]   47,269   [studies]
North Asia   [map]   2,952  
Pacifica   [map]   3,436  
South America   [map]   4,261  
South Asia   [map]   1,894  
Southeast Asia   [map]   2,484  

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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.