1.6
Earthquake Details: 7 km NNE of Greenfield, California, United States
Oct 21, 2026, 23:04:26
- Depth
- 2.49 km
- Felt reports
- No data
Source: USGSUpdated: Oct 21, 2026, 11:42 PM UTC
A magnitude 1.6 earthquake occurred on Oct 21, 2026 at 23:04:26. Epicenter: 7 km NNE of Greenfield, California, United States. Reported depth: 2.49000000953674 km.
Status: Automatic
Tsunami information
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Time & depth
- Local time
- Oct 21, 2026, 16:04:26 PDT
- UTC
- Oct 21, 2026, 23:04:26 UTC
2.49 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
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Nearby major cities
Nearby earthquakes · 12
M2.919 km SW of Toms Place, CAAfterM2.517 km SW of Toms Place, CAAfterM2.57 km W of Cobb, CAAfterM2.37 km W of Cobb, CAAfterM2.32 km W of Round Valley, CAAfterM2.317 km SE of Lake Pillsbury, CAAfterM2.732 km WSW of Tecopa, CAAfterM2.27 km W of Cobb, CAAfterM2.54 km SE of Aromas, CAAfterM2.326 km NNE of Montecito, CAAfterM2.614 km E of Seven Trees, CAAfterM4.010 km N of Lake Pillsbury, CAAfter
Agency measurements
Agencies may use different observations and magnitude scales, and initial estimates can change.
- USGSmd 1.6
nc75453106
- Depth:
- 2.49 km
- Status:
- Automatic
- Time:
- Updated:
- Oct 21, 2026, 11:42 PM UTC
Technical Details
Depth2.49 km
Significance39
Latitude36.3833
Longitude-121.2215
Event IDnc75453106
Magnitude1.6
Updated:Oct 21, 2026, 23:42:24 UTC
Regional Seismicity
External Resources
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Earthquake information is automatically aggregated from the official seismic agencies listed below. Preliminary measurements can change as agencies review an event; use local emergency authorities for safety decisions. Latest successful data update: Oct 21, 2026, 23:42 UTC.
Data sources:
- USGS — Credit: U.S. Geological Survey.
- EMSC — Credit: EMSC/CSEM. Event catalogue data are provided under CC BY 4.0.
- JMA — Source: Japan Meteorological Agency (JMA).
- Geoscience Australia — Based on Australian Earthquakes data by Geoscience Australia. © Commonwealth of Australia. Licensed under CC BY 4.0; the section 5 disclaimer applies.
- GeoNet — We acknowledge the New Zealand GeoNet programme and its sponsors NHC, Earth Sciences NZ, LINZ, NEMA and MBIE for providing earthquake data.
- CENC / Wolfx — CENC earthquake parameters via Wolfx, an independent unofficial relay.
- GFZ / GEOFON — Locations, depths and magnitudes: GFZ/GEOFON using GEVN network data (CC BY 4.0).