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United States · California

M0.4 Earthquake near Mentone, California (United States)

UTC time: 2026-08-21 11:53:00 UTC Local time: —

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About this earthquake

A magnitude M0.4 earthquake was recorded near Mentone, California (United States) on August 21, 2026 at 11:53 UTC. 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 data is provided by USGS and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 183 earthquakes, the strongest at M4.1.

Details

ID
e4a40328903f50618ea451b83013e931a84d29b2
Magnitude
M0.4
Depth
9.3 km
UTC time
2026-08-21 11:53:00 UTC
Local time
—
Country
United States
State
California
City
Mentone
County
San Bernardino County
Village
Mentone
Source
usgs
Coordinates
34.04650, -117.12367
Temperature
25.4°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 (15.2 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: 169 km ·Lava dome(s) ·Elevation: -40 m ·Last eruption: 210 ·United States
  • Ubehebe Craters
    Distance: 332 km ·Maar(s) ·Elevation: 752 m ·Last eruption: -150 ·United States
  • Pinacate
    Distance: 417 km ·Volcanic field ·Elevation: 1'183 m ·Mexico
  • Mammoth Mountain
    Distance: 434 km ·Lava dome(s) ·Elevation: 3'369 m ·Last eruption: 1260 ·United States
  • Uinkaret Field
    Distance: 446 km ·Volcanic field ·Elevation: 1'555 m ·Last eruption: 1100 ·United States
  • Mono-Inyo Craters
    Distance: 452 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
    11.8 kmStraight-line distance
  • Ontario International AirportUnited States · ONT · KONT
    44.0 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

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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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