Springsteen in the USA:

40 Years of Touring as a Study in Spatial Diffusion.

To understand what you’re seeing in the YouTube video below, keep the following in mind:

• each red dot is a performance (data courtesy of the Killing Floor database)
• the intensity or “heat” generated is a function of the location of a show, the size of the venue, and inversely correlated with the overall population within 40km of the concert location. So for instance, a single arena show in New York City will generate less heat than a single arena show in Omaha, NE
• there is a tapering effect applied so returning to a particular area within a few months will reflect a cumulative heat effect.

Well.