Boom over the Tri-Cities - Sep 27, 2026, 10:59 PM
Sunday, September 27, 2026 at 10:59 PM · 1 hour ago
The directional reports so far don’t line up closely enough to triangulate a trustworthy origin. More reports from different locations will sharpen it.
Add your direction →Collecting reports
Reports are still coming in. We compare every boom against seismic records, 911 dispatch activity, weather and known local sources. If we can pin down what it was, this is where it will appear.
More reports make this far more likely, especially from different directions.
What it lines up with
Automatic cross-references. Suggestive, not proof.
Thayer Drive Substation (substation) - about 0.5 km from the estimated origin.
A USGS M1.6484423 earthquake 108 km away, 42h apart.
Conditions weren’t especially sound-carrying. (11°C, wind 7 km/h, 0% cloud)
night on a weekend.
Full moon (97% lit).
Transformer and substation faults set off both a boom and an outage. See who else nearby is out, and when it is coming back.
isthepowerout.comWhat people reported
Each number matches a dot on the map above.
Sounded like an explosion- a longer more diffuse sound than a gunshot but that level of intensity. Created a momentary rattle of the windows and doors
What do you think it was?
Cast your vote. The data’s nearest match: substation - Thayer Drive Substation.
Discussion
Saw the same thing? Have a theory or evidence about what it was? Weigh in.