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M1.5 Depth: 4.4 km

M1.5 Earthquake near Ontario, California (United States)

UTC time: 2026-09-03 21:40:42 UTC Local time: —

About this earthquake

On September 3, 2026 at 21:40 UTC, a magnitude M1.5 earthquake occurred near Ontario, California (United States). The hypocenter lay relatively close to the surface at around 4 km, increasing how strongly it was felt. Earthquakes of this small magnitude are usually barely noticeable and cause no damage.

The event was recorded by USGS. United States: 215 earthquakes were recorded in the past 24 hours, the strongest reaching M5.9.

Map

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 (15.3 km)
Regional average: 15.3 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: 422 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Mono-Inyo Craters
    Distance: 440 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States
  • Pinacate
    Distance: 452 km ·Volcanic field ·Elevation: 1'183 m ·Mexico
  • Mono Lake Volcanic Field
    Distance: 461 km ·Volcanic field ·Elevation: 2'121 m ·Last eruption: 1790 ·United States

Historic earthquake map · United States

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Country statistics · United States

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

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