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United States · California

M1.1 Earthquake near San Bernardino County, California (United States)

UTC time: 2026-09-20 20:22:40 UTC Local time: —
Magnitude
M1.1
Depth
17.8 km
Source
USGS

California · San Bernardino County

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About this earthquake

On September 20, 2026 at 20:22 UTC, a magnitude M1.1 earthquake occurred near San Bernardino County, California (United States). With a focal depth of about 18 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Events of this size typically go unnoticed.

The event was recorded by USGS. United States: over the past 24 hours, QuakeMap24 logged 175 earthquakes, the strongest at M5.3.

Depth profile

Depth profile Depth: 17.8 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 17.8 km
Shallow
17.8 km
17.8 km — close to 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: 175 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
  • Pinacate
    Distance: 423 km ·Volcanic field ·Elevation: 1'183 m ·Mexico
  • Mammoth Mountain
    Distance: 433 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Mono-Inyo Craters
    Distance: 450 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States
  • Uinkaret Field
    Distance: 455 km ·Volcanic field ·Elevation: 1'555 m ·Last eruption: 1100 ·United States

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • San Bernardino International AirportUnited States · SBD · KSBD
    8.0 kmStraight-line distance
  • Ontario International AirportUnited States · ONT · KONT
    35.1 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-09-20

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

20 Sep 2025 – 20 Sep 2026 · M ≥ 2.0 · 2,418 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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