Reports (numbered)Direction it came fromEstimated origin (source)Earthquake (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.
Estimated origin - interesting, not definitive
The red marker is our best guess at the source; the blue dots are where people were. Triangulated from the 3 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.
Confidence:53% · Moderatecompass bearings
What it lines up with
Automatic cross-references. Suggestive, not proof.
📍Nearest known sourcestrong
Richland Sub Station (substation) - about 0.9 km from the estimated origin.
🔴Seismic activity
A USGS M2.06 earthquake 18 km away, 11h apart.
🌤️Conditions
Conditions weren’t especially sound-carrying. (20°C, wind 6 km/h, 0% cloud)