Boom over the Tri-Cities - Jun 29, 2026, 7:25 PM

Monday, June 29, 2026 at 7:28 PM · 8 hours ago

2 reports2 contributors1 gave a direction

Reports (numbered)Direction it came fromEarthquake (USGS)

🎆This event is during the 4th of July window, when fireworks set off booms all over the area. Some of these reports - and the estimated origin - may be fireworks rather than one source.

Origin not pinned yet

We need at least two reports that note which direction it came from (ideally from different spots) before we can triangulate an origin.

Add your direction →

What it lines up with

Automatic cross-references. Suggestive, not proof.

📍Nearest known source

Richland Sub Station (substation) - about 5.3 km from the estimated origin.

🔴Seismic activity

A USGS M1.98 earthquake 74 km away, 6h apart.

🌤️Conditions

Conditions weren’t especially sound-carrying. (24°C, wind 28 km/h, 12% cloud)

🕒Timing

evening on a weekday.

🌕Moon

Full moon (100% lit).

Heard the boom and lost power?

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.com

What people reported

Each number matches a dot on the map above.

Heard a boom · intensity 3/5🎆 Fireworks season

anon-3544 · Jun 29, 7:28 PM · 8 hours ago

Heard a boom · intensity 2/5 · from the WNW🎆 Fireworks season

anon-5461 · Jun 29, 7:25 PM · 8 hours ago

What do you think it was?

Cast your vote. The data’s nearest match: substation - Richland Sub Station.

0 votes so far.

Discussion

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