Great Lakes / Upper-Midwest Cluster.
official-recordanomaly_regionProject Blue Book
The Great Lakes / Upper-Midwest cluster describes a recurring density of UFO reports along the lake shores of Michigan, Illinois, Wisconsin, and Ohio, with the Lake Michigan basin especially…
The Great Lakes / Upper-Midwest cluster describes a recurring density of UFO reports along the lake shores of Michigan, Illinois, Wisconsin, and Ohio, with the Lake Michigan basin especially prominent. It is a geographic pattern in civilian databases rather than a single event. It matters as an example of how report density correlates with population, shoreline, and folklore tradition.