2.5
Earthquake Details: 11 km SW of Round Valley, California, United States
8/18/2026, 9:54:59 PM
A magnitude 2.5 earthquake occurred near 11 km SW of Round Valley, California, United States on 8/18/2026 at 9:54:59 PM. The seismic event was recorded at a depth of 17.46 km. No tsunami warning was issued.
No Tsunami WarningStatus: reviewedType: earthquake
Regional Seismicity
Technical Details
Depth17.46 km
Significance99
Latitude37.3467
Longitude-118.6925
Event IDnc75420867
Magnitude2.5
Updated:8/19/2026, 12:12:22 AM
External Resources
View on USGS Official SiteLoading map...
Time & depth
- Local time
- 8/18/2026, 2:54:59 PM PDT
- UTC
- 8/18/2026, 9:54:59 PM UTC
17.46 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby major cities
Nearby event sequence · 12
M2.67 km SW of Atascadero, California, United StatesBeforeM2.810 km ENE of Coso Junction, California, United StatesBeforeM2.86 km SE of Ontario, California, United StatesBeforeM2.63 km SE of Concord, California, United StatesBeforeM2.712 km S of Lompoc, California, United StatesBeforeM2.87 km ESE of Palomar Observatory, California, United StatesBeforeM2.735 km NNW of Santa Barbara Is., California, United StatesBeforeM2.875 km ENE of Tonopah, Nevada, United StatesBeforeM2.520 km ESE of Silver Springs, Nevada, United StatesBeforeM2.975 km ENE of Tonopah, Nevada, United StatesAfterM3.076 km ENE of Tonopah, Nevada, United StatesAfterM3.614 km N of Warner Springs, California, United StatesAfter
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: Aug 19, 2026, 12:12 AM 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.