Boom over the Tri-Cities - Jun 20, 2026, 9:20 PM

Saturday, June 20, 2026 at 10:28 PM · 42 mins ago

5 reports4 contributors1 photos & videos2 gave a direction

Reports (numbered)Direction it came fromEstimated origin (source)Earthquake (USGS)

Estimated origin - interesting, not definitive

Triangulated from 2 directional reports. The red marker is our best guess at the source; the blue dots are where people were. It sharpens as more people report which way it came from.

Confidence:22% · Lowcompass bearings

What it lines up with

Automatic cross-references. Suggestive, not proof.

📍Nearest known sourcestrong

Benton Substation (BPA) (substation) - about 4.6 km from the estimated origin.

🌤️Conditions

Conditions weren’t especially sound-carrying. (23°C, wind 5 km/h, 0% cloud)

🕒Timing

night on a weekend.

🌕Moon

First quarter (35% lit).

What people reported

Each number matches a dot on the map above.

Heard a boom · intensity 3/5

Jun 20, 10:28 PM · 42 mins ago

Heard a boom · intensity 3/5 · from the ENE

Jun 20, 9:20 PM · 2 hours ago

Fireworks?

Heard a boom · intensity 2/5 · from the NE

Jun 20, 10:30 PM · 39 mins ago

Heard a boom · intensity 2/5

Jun 20, 10:28 PM · 41 mins ago

Heard a boom · intensity 2/5

Jun 20, 9:48 PM · 1 hour ago

What do you think it was?

Cast your vote. The data’s nearest match: substation - Benton Substation (BPA).

0 votes so far.

Discussion

Saw the same thing? Have a theory or evidence about what it was? Weigh in.