Observed earthquake
203 km SSE of Tateyama, Japan
Recent observationReported by 3 agencies. Every solution below is that agency's own measurement, stored unaltered.
Agency solutions
The same earthquake as measured independently by each agency. Values are never averaged or rewritten.
| Agency | Magnitude | Depth | Origin time | Epicentre | Review status | Source record |
|---|---|---|---|---|---|---|
| GEOFONGFZ Helmholtz Centre for Geosciences | M5.0 mb | 27 km | 2026-10-27 01:17:49 UTC | 33.34°N, 141.00°E | Not stated | gfz2026vajz ↗ |
| USGSUnited States Geological Survey | M4.6 mb | 67 km | 2026-10-27 01:17:53 UTC | 33.28°N, 140.71°E | Reviewed by an analyst31 stations | us7000tte0 ↗ |
| EMSCEuropean-Mediterranean Seismological Centre | M4.6 mb | 49 km | 2026-10-27 01:17:51 UTC | 33.35°N, 140.97°E | Not stated | 20261027_0000017 ↗ |
Source: Earthquake solutions from the GEOFON programme, GFZ Helmholtz Centre for Geosciences. · Retrieved: 2026-10-27 13:25:52 UTC · grouped with match confidence 92%
Source: Earthquake data courtesy of the U.S. Geological Survey. · Retrieved: 2026-10-27 13:25:48 UTC
Source: Earthquake data from the European-Mediterranean Seismological Centre (EMSC) via SeismicPortal. · Retrieved: 2026-10-27 13:25:50 UTC · grouped with match confidence 87%
Why the agencies differ
Differences of a few tenths of a magnitude unit and tens of kilometres are normal and expected. Each agency uses a different set of seismic stations, a different velocity model for the Earth's interior, and sometimes a different magnitude scale altogether. None of them is “wrong”; they are independent measurements of the same event.
Prakruti groups solutions only when they agree closely in both time and location, and shows the preferred solution — favouring an analyst-reviewed moment magnitude where one exists — while keeping every other solution visible above.