each new quake at or above the size, with where, how deep and when
alerts at magnitude 6+, a tsunami flag or a PAGER impact level
a daily count for the last 24 hours
How often
Every 1 hr, run by Coinjure with the Earthquakes template, 3 runs so far.
Method
Every run asks the USGS earthquake catalog for quakes of magnitude 2.5 and up within 300 km of Tokyo, Japan and records each new one once, with a daily count. Early magnitudes are revised as more stations report.
Running since
Oct 29, 2026, 1 finding on the record.
Never edited
Every finding is hashed when it lands and chained to the one before it, so any later change would show. Each finding's page says how to check it.