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. This combines two independent clues: the 7 directions people pointed, and how loud it was where each person stood (a boom is loudest nearest its source). The marker sits where those two agree - which is why it's more trustworthy than either alone. Adding more directions or loudness reports sharpens it.
Confidence:73% · Strongbearings + loudness
What it lines up with
Automatic cross-references. Suggestive, not proof.
📍Nearest known sourcestrong
Thayer Drive Substation (substation) - about 0.8 km from the estimated origin.
🔴Seismic activity
A USGS M1.7 earthquake 40 km away, 39h apart.
🌤️Conditions
Conditions weren’t especially sound-carrying. (20°C, wind 9 km/h, 0% cloud)