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United States · California

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

UTC time: 2026-10-28 18:08:17 UTC Local time: —

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About this earthquake

On October 28, 2026 at 18:08 UTC, a magnitude M1.1 earthquake occurred near Riverside County, California (United States). With a focal depth of about 9 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 event was recorded by USGS. United States: over the past 24 hours, QuakeMap24 logged 185 earthquakes, the strongest at M3.9.

Details

ID
f9a42a2ad1b1eb4778ba62bcb5cf2f07a1ae8418
Magnitude
M1.1
Depth
9.3 km
UTC time
2026-10-28 18:08:17 UTC
Local time
—
Country
United States
State
California
City
Riverside County
County
Riverside County
Source
usgs
Coordinates
33.97967, -116.87733
Temperature
16.6°C

Depth profile

Depth profile Depth: 9.3 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 9.3 km
Shallow
9.3 km
9.3 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: 146 km ·Lava dome(s) ·Elevation: -40 m ·Last eruption: 210 ·United States
  • Ubehebe Craters
    Distance: 342 km ·Maar(s) ·Elevation: 752 m ·Last eruption: -150 ·United States
  • Pinacate
    Distance: 394 km ·Volcanic field ·Elevation: 1'183 m ·Mexico
  • Uinkaret Field
    Distance: 433 km ·Volcanic field ·Elevation: 1'555 m ·Last eruption: 1100 ·United States
  • Mammoth Mountain
    Distance: 450 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Mono-Inyo Craters
    Distance: 467 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • San Bernardino International AirportUnited States · SBD · KSBD
    35.6 kmStraight-line distance
  • Palm Springs International AirportUnited States · PSP · KPSP
    38.0 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-10-28

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

05 Oct 2025 – 05 Oct 2026 · M ≥ 2.0 · 2,447 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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