Boom over the Tri-Cities - Jun 23, 2026, 9:55 PM
Tuesday, June 23, 2026 at 9:55 PM · 19 hours ago
The red marker is our best guess at the source; the blue dots are where people were. Triangulated from the 2 directions people drew - each arrow is a line pointing back toward the source, and the marker is where those lines cross. It sharpens as more people report which way it came from, and as we get loudness and exact-timing reports.
What it lines up with
Automatic cross-references. Suggestive, not proof.
Thayer Drive Substation (substation) - about 2.5 km from the estimated origin.
A USGS M1.7 earthquake 42 km away, 8h apart.
Conditions weren’t especially sound-carrying. (24°C, wind 5 km/h, 0% cloud)
night on a weekday.
First quarter (66% lit).
What people reported
Each number matches a dot on the map above.
Loud boom. Appeared to be coming from the West.
Loud boom - similar to a large single firework
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.