1.5
Earthquake Details: 5 km SE of Ontario, California
Sep 3, 2026, 21:40:42
A magnitude 1.5 earthquake occurred near 5 km SE of Ontario, California on Sep 3, 2026 at 21:40:42. The seismic event was recorded at a depth of 4.31 km. No tsunami warning was issued.
No Tsunami WarningStatus: ReviewedType: Earthquake
Regional Seismicity
Technical Details
Depth4.31 km
Significance35
Latitude34.0222
Longitude-117.5880
Event IDci41541488
Magnitude1.5
Updated:Sep 3, 2026, 21:55:34 UTC
External Resources
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Time & depth
- Local time
- Sep 3, 2026, 14:40:42 PDT
- UTC
- Sep 3, 2026, 21:40:42 UTC
4.31 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby major cities
Nearby event sequence · 12
M1.64 km WNW of Muscoy, CaliforniaBeforeM2.022 km NNW of Santa Cruz Is. (E end), CaliforniaBeforeM2.219 km NW of Progreso, B.C., MXBeforeM1.59 km ENE of Lebec, CaliforniaBeforeM1.714 km N of Warner Springs, CaliforniaBeforeM1.916 km WSW of Johannesburg, CaliforniaBeforeM3.26 km SE of Ontario, CaliforniaBeforeM1.65 km SSE of Home Gardens, CaliforniaBeforeM1.745 km NNW of Los Algodones, B.C., MXBeforeM2.5NevadaBeforeM1.616 km WSW of Johannesburg, CaliforniaBeforeM1.66 km SE of Poplar-Cotton Center, CaliforniaBefore
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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: Sep 3, 2026, 21:55 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.