This satellite image superimposed with data from VIIRS Nightfire (VNF) displays the north-west corner of North Dakota. Each pin is a specific heat signature from one or more of the more than 16,000 active wells in the region that falls in the same detector footprint. Red signatures are the hottest followed by yellow, green, blue, and finally purple. As you can see this concentration is made up of mostly red marks meaning that these wells are burning extremely hot natural gases. This concentration of wells is one densest in the United States, accounting for 10% of all jobs in North Dakota and draws approximately $139 billion in investment since 2006. (DMR)