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United States · California

M0.9 Earthquake near Ontario, California (United States)

UTC time: 2026-09-30 17:23:18 UTC Local time: —

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About this earthquake

On September 30, 2026 at 17:23 UTC, a magnitude M0.9 earthquake occurred near Ontario, California (United States). With a focal depth of about 4 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Earthquakes of this small magnitude are usually barely noticeable and cause no damage.

The data is provided by USGS and cross-checked across seismological networks. United States: 175 earthquakes were recorded in the past 24 hours, the strongest reaching M4.3.

Details

ID
4b4b79a112ff9ffd73e600cead6c94ce8fcfede9
Magnitude
M0.9
Depth
4.4 km
UTC time
2026-09-30 17:23:18 UTC
Local time
—
Country
United States
State
California
City
Ontario
County
San Bernardino County
Source
usgs
Coordinates
34.01550, -117.58617
Temperature
24.6°C

Depth profile

Depth profile Depth: 4.4 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 4.4 km
Shallow
4.4 km
4.4 km — shallower than the regional average (15.2 km)
Regional average: 15.2 km
Why depth matters

Shallow quakes release energy near the surface — shaking is felt more strongly and damage potential is higher.

Depth classes per USGS

Volcanoes nearby

  • Salton Buttes
    Distance: 204 km ·Lava dome(s) ·Elevation: -40 m ·Last eruption: 210 ·United States
  • Ubehebe Craters
    Distance: 334 km ·Maar(s) ·Elevation: 752 m ·Last eruption: -150 ·United States
  • Mammoth Mountain
    Distance: 423 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Mono-Inyo Craters
    Distance: 441 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States
  • Pinacate
    Distance: 451 km ·Volcanic field ·Elevation: 1'183 m ·Mexico
  • Mono Lake Volcanic Field
    Distance: 462 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Ontario International AirportUnited States · ONT · KONT
    4.7 kmStraight-line distance
  • San Bernardino International AirportUnited States · SBD · KSBD
    33.4 kmStraight-line distance
  • John Wayne Orange County International AirportUnited States · SNA · KSNA
    46.0 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-09-30

This selection shows geographic proximity, not a hazard zone or confirmed impacts. Distances use recorded site coordinates. Sources & data dates

California

Context for this earthquake

30 Sep 2025 – 30 Sep 2026 · M ≥ 2.0 · 2,441 Catalogue entries

Sufficiently reliable matching data are not currently available for a direct comparison. The area profile shows the available records and their limitations.

Open seismic profile

Historic earthquake map · United States

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Explore recent and long-term earthquake activity in this country. Use filters to narrow down by magnitude, depth, and date range.

Country statistics · United States

Country overview
View earthquake KPIs, strongest and latest events, and averages for this country.

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