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United States · California

M1.0 Earthquake near Riverside County, California (United States)

UTC time: 2026-09-28 17:14:28 UTC Local time: —

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About this earthquake

A magnitude M1.0 earthquake was recorded near Riverside County, California (United States) on September 28, 2026 at 17:14 UTC. With a focal depth of about 16 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 163 earthquakes, the strongest at M4.1.

Details

ID
46522f41fc3e6b483f5a97c8c820398877355176
Magnitude
M1.0
Depth
15.9 km
UTC time
2026-09-28 17:14:28 UTC
Local time
—
Country
United States
State
California
City
Riverside County
County
Riverside County
Source
usgs
Coordinates
33.81683, -116.76583
Temperature
20.9°C

Depth profile

Depth profile Depth: 15.9 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 15.9 km
Shallow
15.9 km
15.9 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: 127 km ·Lava dome(s) ·Elevation: -40 m ·Last eruption: 210 ·United States
  • Ubehebe Craters
    Distance: 362 km ·Maar(s) ·Elevation: 752 m ·Last eruption: -150 ·United States
  • Pinacate
    Distance: 375 km ·Volcanic field ·Elevation: 1'183 m ·Mexico
  • Uinkaret Field
    Distance: 437 km ·Volcanic field ·Elevation: 1'555 m ·Last eruption: 1100 ·United States
  • Mammoth Mountain
    Distance: 471 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • San Luis, Isla
    Distance: 482 km ·Tuff cone ·Elevation: 183 m ·Last eruption: -1141 ·Mexico

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Palm Springs International AirportUnited States · PSP · KPSP
    24.0 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-09-28

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

28 Sep 2025 – 28 Sep 2026 · M ≥ 2.0 · 2,434 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

Open history map
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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