Persistent Signal Catalog · Class III
The March coincidences
A set of detections recorded at widely separated stations in the same instant, surviving every test for chance and cross-talk.
A set of detections recorded at widely separated stations in the same instant, surviving every test for chance and cross-talk.
- Source
- FAL-PSC-2018-1180-PUB
- As of
- 2026-03-31
- Method
- Illustrative public visualization; raw station records are not reproduced.
Public packet
- coincident timing abstract
- station separation class
- cross-talk rejection memo
- chance-coincidence worksheet
Review controls
- Coordinate source
- Multi-station geometry retained in restricted coincidence file
- Uncertainty
- No public centroid; detection is defined by simultaneity rather than location
- Release state
- Under study; public timing abstract released
Processing notes
- sub-second coincidence screen after clock-drift correction
- shared infrastructure and network cross-talk rejection
- weather, seismic, and power-grid event comparison
- chance alignment estimate across retained station hours
Ordinary-source checks
- maintenance and station schedule review
- ordinary-source exclusion summary
- release review before public posting
Release limits
- station pairings and exact timing offsets are restricted
- public classification reports behavior only
- external requests receive aggregate timing bands
Public release note
Public release is limited to timing behavior and station separation class. Exact station pairings are removed.