USGS ComCat lists used on https://factchecked.science/planet-alignments-earthquakes/
Every earthquake of magnitude 6.5 and above (the analysis keeps those above 6.5), from the USGS FDSN event service,
as fetched on 2026-10-28. USGS data are in the public domain. Unchanged bytes; file, query URL, fetch time, size, SHA-256:

usgs-m6.5-2010-01-01-2013-01-01.csv
  https://earthquake.usgs.gov/fdsnws/event/1/query?format=csv&starttime=2010-01-01&endtime=2013-01-01&minmagnitude=6.5&orderby=time-asc
  fetched 2026-10-28T16:07Z, 27308 bytes, SHA-256 7af6279fd0eb9cd6ab84d9f634e7290d9573bafb1f234365c76455d522a84544

usgs-m6.5-2013-01-01-2026-01-01.csv
  https://earthquake.usgs.gov/fdsnws/event/1/query?format=csv&starttime=2013-01-01&endtime=2026-01-01&minmagnitude=6.5&orderby=time-asc
  fetched 2026-10-28T16:22:22Z, 103934 bytes, SHA-256 a8a7e55f413bc5c465cea796b3b7fefa56fe75e89785eeb76b8173fda4db6129

usgs-m6.5-2000-01-01-2010-01-01.csv
  https://earthquake.usgs.gov/fdsnws/event/1/query?format=csv&starttime=2000-01-01&endtime=2010-01-01&minmagnitude=6.5&orderby=time-asc
  fetched 2026-10-28T16:22:23Z, 76670 bytes, SHA-256 09e93ed8825eea71a6cd9b5b6b5abc4071eb4d20bd150c0115d49bcec90d8bf4
