Reports (numbered)Direction it came fromEstimated origin (source)Earthquake (USGS)
Estimated origin - interesting, not definitive
The red marker is our best guess at the source; the blue dots are where people were. Estimated from how strong it felt across the area - loudest closest to the source. There aren't enough direction arrows yet, so this leans on the loudness pattern alone. A few people reporting which way it came from would sharpen it a lot.
Confidence:52% · Moderateloudness falloff
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.
📍Nearest known sourcestrong
Thayer Drive Substation (substation) - about 0.5 km from the estimated origin.
🔴Seismic activity
A USGS M1.7 earthquake 42 km away, 15h apart.
🌤️Conditions
Conditions weren’t especially sound-carrying. (21°C, wind 8 km/h, 0% cloud)