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I assume it must be. The incredibly bright spots at Keene, North Dakota and the northern edge of Alaska have similar low population/bright spots.

Seems like the right answer. I was looking around on some maps until I found things marked SWD - which is Salt Water Disposal. Apparently the "safe" way to dispose of the used fluids from fracking.

https://www.google.com/maps/search/swd+north+dakota/@47.6690...

Check out this spot in northern Siberia:

https://www.lightpollutionmap.info/#zoom=5.58&lat=67.9757&lo...

I was drawn to that same spot because it was big but there's no city there on the map. I opened google map to see what was there and found this: https://www.google.com/maps/place/Vankor+manufacturing+site/...

Seems to be an oil field: https://en.wikipedia.org/wiki/Vankor_Field

Also didn't google it as much, but it looks like oil fields in Texas give off plenty of light as well: https://www.lightpollutionmap.info/#zoom=9.14&lat=28.6928&lo...

I was looking at this same spot.

People have uploaded some great pictures from there[0]!

[0] https://www.google.com/maps/place/Vankor+manufacturing+site/...

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