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United States · California

M4.2 Earthquake near Riverside County, California (United States)

UTC time: 2026-01-21 08:30:08 UTC Local time: —

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About this earthquake

A magnitude M4.2 earthquake was recorded near Riverside County, California (United States) on January 21, 2026 at 08:30 UTC. The hypocenter lay relatively close to the surface at around 4 km, increasing how strongly it was felt. Earthquakes of this magnitude are clearly felt; minor damage to vulnerable buildings is possible.

The data is provided by ISC and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 199 earthquakes, the strongest at M3.9.

Details

ID
de298bd82207cdac8e7cd7239a3ea6dfd1da3648
Magnitude
M4.2
Depth
4.0 km
UTC time
2026-01-21 08:30:08 UTC
Local time
—
Country
United States
State
California
City
Riverside County
County
Riverside County
Source
isc
Coordinates
33.89900, -116.17000
Temperature
7.3°C

Depth profile

Depth profile Depth: 4 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 4 km
Shallow
4 km
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: 93 km ·Lava dome(s) ·Elevation: -40 m ·Last eruption: 210 ·United States
  • Pinacate
    Distance: 338 km ·Volcanic field ·Elevation: 1'183 m ·Mexico
  • Ubehebe Craters
    Distance: 366 km ·Maar(s) ·Elevation: 752 m ·Last eruption: -150 ·United States
  • Uinkaret Field
    Distance: 390 km ·Volcanic field ·Elevation: 1'555 m ·Last eruption: 1100 ·United States
  • San Francisco Volcanic Field
    Distance: 441 km ·Volcanic field ·Elevation: 3'850 m ·Last eruption: 1075 ·United States
  • San Luis, Isla
    Distance: 467 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
    32.1 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-10-29

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 ≥ 3.0 · 239 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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