Observed earthquake
7 km NW of The Geysers, CA
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 | M2.3 md | 2.6 km | 2026-10-09 00:04:27 UTC | 38.81°N, 122.82°W | Preliminary / automatic54 stations | nc75446676 ↗ |
| EMSCEuropean-Mediterranean Seismological Centre | M2.3 md | 2.6 km | 2026-10-09 00:04:27 UTC | 38.81°N, 122.82°W | Not stated | 20261009_0000001 ↗ |
| USGSUnited States Geological Survey | M0.9 md | 1.8 km | 2026-10-09 00:04:14 UTC | 38.83°N, 122.82°W | Preliminary / automatic16 stations | nc75446671 ↗ |
Source: Earthquake data courtesy of the U.S. Geological Survey. · Retrieved: 2026-10-09 00:08:35 UTC
Source: Earthquake data from the European-Mediterranean Seismological Centre (EMSC) via SeismicPortal. · Retrieved: 2026-10-09 00:08:37 UTC · grouped with match confidence 100%
Source: Earthquake data courtesy of the U.S. Geological Survey. · Retrieved: 2026-10-09 00:08:35 UTC · grouped with match confidence 67%
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.
This grouping was flagged for human review because the agencies disagree by more than the usual margin. It is shown with that caveat rather than hidden.