2.3
Earthquake Details: 4 km E of Challenge-Brownsville, CA
Sep 1, 2026, 06:19:44
A magnitude 2.3 earthquake occurred near 4 km E of Challenge-Brownsville, CA on Sep 1, 2026 at 06:19:44. The seismic event was recorded at a depth of 7.07 km. No tsunami warning was issued.
No Tsunami WarningStatus: ReviewedType: Earthquake
Regional Seismicity
Technical Details
Depth7.07 km
Significance83
Latitude39.4643
Longitude-121.2177
Event IDnc75428072
Magnitude2.3
Updated:Sep 1, 2026, 07:37:21 UTC
External Resources
View on NC Official SiteLoading map...
Time & depth
- Local time
- Aug 31, 2026, 23:19:44 PDT
- UTC
- Sep 1, 2026, 06:19:44 UTC
7.07 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby major cities
Nearby event sequence · 12
M2.8209 km W of Ferndale, CaliforniaBeforeM2.977 km W of Petrolia, CABeforeM2.33 km NNE of Graton, CABeforeM2.16 km NW of The Geysers, CABeforeM2.12 km SE of Pacifica, CABeforeM2.28 km SE of Soda Bay, CABeforeM1.911 km ESE of Willow Creek, CABeforeM2.419 km SW of Toms Place, CABeforeM2.021 km W of New Idria, CABeforeM4.4184 km W of Ferndale, CaliforniaBeforeM2.115 km W of Ukiah, CAAfterM2.62 km N of Middletown, CAAfter
You may also find these tools useful
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: Sep 1, 2026, 07:37 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.