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United States · California

M1.3 Earthquake near Riverside, California (United States)

UTC time: 2026-08-23 18:30:51 UTC Local time: —

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About this earthquake

A magnitude M1.3 earthquake was recorded near Riverside, California (United States) on August 23, 2026 at 18:30 UTC. The hypocenter lay relatively close to the surface at around 33 km, increasing how strongly it was felt. Events of this size typically go unnoticed.

The event was recorded by SCEDC. United States: over the past 24 hours, QuakeMap24 logged 183 earthquakes, the strongest at M4.1.

Details

ID
01fed29434e9fd869d420e9283d92763e746341f
Magnitude
M1.3
Depth
33.2 km
UTC time
2026-08-23 18:30:51 UTC
Local time
—
Country
United States
State
California
City
Riverside
County
Riverside County
Source
scedc
Coordinates
33.97283, -117.41500
Temperature
37.0°C

Depth profile

Depth profile Depth: 33.2 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 33.2 km
Shallow
33.2 km
33.2 km — deeper 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: 188 km ·Lava dome(s) ·Elevation: -40 m ·Last eruption: 210 ·United States
  • Ubehebe Craters
    Distance: 339 km ·Maar(s) ·Elevation: 752 m ·Last eruption: -150 ·United States
  • Mammoth Mountain
    Distance: 432 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Pinacate
    Distance: 435 km ·Volcanic field ·Elevation: 1'183 m ·Mexico
  • Mono-Inyo Craters
    Distance: 450 km ·Lava dome(s) ·Elevation: 2'796 m ·Last eruption: 1380 ·United States
  • Mono Lake Volcanic Field
    Distance: 471 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
    19.5 kmStraight-line distance
  • San Bernardino International AirportUnited States · SBD · KSBD
    21.4 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-11-15

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

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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