North America geographically is not the same as North America tectonically. Hawaii is on the Pacific plate, but as part of the US, geographically it is often considered as part of North America (though definitions vary). Similarly, the North American Plate contains portions of Russia (which geographically tends to not be considered part of North America), but does not contain the Caribbean (which does tend to be considered part of North America geographically). In my answer, I assumed OP was using the term North America in a geographic context.