Observed earthquake
28 km SSE of Nemuro, Japan
Recent observationReported by 2 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 |
|---|---|---|---|---|---|---|
| USGSUnited States Geological Survey | M4.4 mb | 68 km | 2026-10-09 16:46:16 UTC | 43.10°N, 145.75°E | Reviewed by an analyst17 stations | us6000u18b ↗ |
| EMSCEuropean-Mediterranean Seismological Centre | M3.7 m | 68 km | 2026-10-09 16:46:16 UTC | 43.10°N, 145.75°E | Not stated | 20261009_0000245 ↗ |
Source: Earthquake data courtesy of the U.S. Geological Survey. · Retrieved: 2026-10-11 19:58:45 UTC · grouped with match confidence 93%
Source: Earthquake data from the European-Mediterranean Seismological Centre (EMSC) via SeismicPortal. · Retrieved: 2026-10-09 16:57:48 UTC
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.