Butte-Silver Bow's reading looks wrong, and this site says so rather than hide it

The radiance figure on file for Butte-Silver Bow is exactly 0.0, and a city of 35,480 people does not genuinely read zero light from orbit. That points to a sampling miss, the wrong coordinate, water, or unlit terrain right where the sample point landed, rather than an actual dark sky.

This is flagged instead of shown as a normal result because reporting it as "Butte-Silver Bow's dark sky" would be reporting a data error as a fact, see the data quality guide for how this gets checked.

The nearest reliable reading to Butte-Silver Bow

Helena, MT is about 57 miles from Butte-Silver Bow and has a trustworthy reading: urban band. It's the closest usable stand-in until Butte-Silver Bow's own figure is corrected.

Because Butte-Silver Bow's own coordinate is what produced the bad reading, that distance figure is itself approximate, not a confirmed measurement.

Butte-Silver Bow against the rest of the dataset

Butte-Silver Bow, MT has a population of about 35,480, one of 3,206 US cities in this dataset, 3,187 of which have a usable brightness reading today.