1.6
Earthquake Details: 10 km ENE of Blackhawk, California, United States
Oct 21, 2026, 18:18:00
- Depth
- 6.67 km
- Felt reports
- No data
Source: USGSUpdated: Oct 21, 2026, 06:52 PM UTC
A magnitude 1.6 earthquake occurred on Oct 21, 2026 at 18:18:00. Epicenter: 10 km ENE of Blackhawk, California, United States. Reported depth: 6.67 km.
Tsunami information
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Time & depth
- Local time
- Oct 21, 2026, 11:18:00 PDT
- UTC
- Oct 21, 2026, 18:18:00 UTC
6.67 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
M2.42 km SSW of San Ramon, CABeforeM2.55 km WSW of Burning Man Earth, NevadaBeforeM2.44 km SE of San Ramon, CABeforeM3.180 km WNW of Ferndale, CABeforeM2.839 km SSW of Qualeys Camp, NVBeforeM2.732 km SE of Bodie, CABeforeM2.413 km WSW of Kelseyville, CABeforeM2.52 km NW of The Geysers, CABeforeM3.139 km SSW of Likely, CABeforeM2.5central CaliforniaBeforeM3.314 km SE of Petrolia, CAAfterM3.223 km WSW of Gustine, CAAfter
Agency measurements
Agencies may use different observations and magnitude scales, and initial estimates can change.
- USGSM 1.58
nc75452966
- Depth:
- 6.67 km
- Time:
- Updated:
- Oct 21, 2026, 06:52 PM UTC
Technical Details
Depth6.67 km
Significance38
Latitude37.8427
Longitude-121.7973
Event IDnc75452966
Magnitude1.6
Updated:Oct 21, 2026, 18:52:24 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, 18:52 UTC.
Data sources:
- USGS — Credit: U.S. Geological Survey.
- EMSC — Credit: EMSC/CSEM. Event catalogue data are provided under CC BY 4.0. 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. CC BY 4.0
- GeoNet — We acknowledge the New Zealand GeoNet programme and its sponsors NHC, Earth Sciences NZ, LINZ, NEMA and MBIE for providing earthquake data.