1.7
Earthquake Details: 5 km SE of Ontario, California, United States
Oct 9, 2026, 21:48:51
- Depth
- 5.34 km
- Felt reports
- No data
Source: CIUpdated: Oct 9, 2026, 10:30 PM UTC
A magnitude 1.7 earthquake occurred on Oct 9, 2026 at 21:48:51. Epicenter: 5 km SE of Ontario, California, United States. Reported depth: 5.34 km.
Tsunami information
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Time & depth
- Local time
- Oct 9, 2026, 14:48:51 PDT
- UTC
- Oct 9, 2026, 21:48:51 UTC
5.34 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
M3.4Gulf Of CaliforniaBeforeM3.8Gulf Of CaliforniaBeforeM3.4Gulf Of CaliforniaBeforeM3.186 km SSE of Estacion Coahuila, B.C, MXBeforeM3.22 km SW of Signal Hill, CABeforeM3.6Gulf Of CaliforniaBeforeM3.6Gulf Of CaliforniaBeforeM3.1Gulf Of CaliforniaBeforeM3.2Gulf Of CaliforniaAfterM3.6Gulf Of CaliforniaAfterM3.4Baja California, MéxicoAfterM3.3Sonora, MéxicoAfter
Agency measurements
Agencies may use different observations and magnitude scales, and initial estimates can change.
- CIM 1.7
ci41345799
- Depth:
- 5.34 km
- Time:
- Updated:
- Oct 9, 2026, 10:30 PM UTC
Technical Details
Depth5.34 km
Significance44
Latitude34.0193
Longitude-117.5867
Event IDci41345799
Magnitude1.7
Updated:Oct 9, 2026, 22:30:40 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 9, 2026, 22:30 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.